Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Anne, Princess Royal, visits at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Eddie Mulholland /Pool via REUTERS

Britain's Prince Edward, Earl of Wessex reacts during a visit at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex speaks with Ronan Keating and Alex Jones during a visit at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex speaks with Ronan Keating and Alex Jones during a visit at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex and Sophie Countess of Wessex visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex and Sophie, Countess of Wessex speak to Ronan Keating and members of The One Show team during a visit at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex speaks with Ronan Keating and Alex Jones during a visit at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex and Sophie Countess of Wessex visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex and Sophie Countess of Wessex visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Michael of Kent visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Michael of Kent and Prince Michael of Kent visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Anne, Princess Royal, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Anne, Princess Royal, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Anne, Princess Royal, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Alexandra visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Alexandra visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Alexandra visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Princess Alexandra visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex and Sophie Countess of Wessex visit the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Prince Edward, Earl of Wessex and Sophie Countess of Wessex speak at the Queen?s Green Canopy Garden, during their visit to the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

Britain's Sophie, Countess of Wessex, visits the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. Chris Jackson/Pool via REUTERS

A woman wearing a floral design hat looks out from her exhibition stand as she attends the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

A visitor attends the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

A dried flower design depicting a human skull is displayed at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

Detail of a rose is seen at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

A visitor photographs a display of Bonsai trees as she attends the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

A dried flower design depicting a human skull is displayed at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville TPX IMAGES OF THE DAY

A floral display is seen at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

Detail of a Dahlia is seen at the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville

Chelsea Pensioners attend the RHS Chelsea Flower Show, delayed from its usual spring dates because of lockdown restrictions amid the spread of the coronavirus disease (COVID-19) pandemic, London, Britain, September 20, 2021. REUTERS/Toby Melville