A Royal Mail postbox is seen with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A Royal Mail postbox is seen with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A view shows a decorative topper for a Royal Mail postbox, made by a group known as The Yarnbombers to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

People walk next to a Royal Mail postbox with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A Royal Mail postbox is seen with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A Royal Mail postbox is seen with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A view shows a decorative topper for a Royal Mail postbox, made by a group known as The Yarnbombers to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A tag hangs from a Royal Mail postbox, with information about a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A woman walks next to a Royal Mail postbox with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A postman collects mail from a Royal Mail postbox with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A Royal Mail postbox is seen with a decorative topper made by a group known as The Yarnbombers, to raise money for people affected by the spread of the coronavirus disease (COVID-19), in St Albans, Britain, August 5, 2020. REUTERS/Andrew Couldridge

A delivery vehicle drives along a road near Mount Pleasant, in London, Britain, June 25, 2020. REUTERS/John Sibley

The logo of Royal Mail is seen outside the Mount Pleasant Sorting Office as a delivery vehicle arrives, in London, Britain, June 25, 2020. REUTERS/John Sibley

A Royal Mail delivery vehicle drives past a mural on the side of the Postal Museum in Mount Pleasant, London, Britain, June 25, 2020. REUTERS/John Sibley

A lady posts letters in a royal mail post box painted blue in support of NHS and to celebrate the 100th birthday of army veteran Captain Tom Moore, following the outbreak of the coronavirus disease (COVID-19), in Marston Moretaine, Britain, April 30, 2020. REUTERS/Peter Cziborra

A man cleans a royal mail post box painted blue in support of NHS and to celebrate 100th birthday of army veteran Captain Tom Moore ahead of the Royal Air Force (RAF) flypast over his house, as the spread of the coronavirus disease (COVID-19) continues, in Marston Moretaine, Britain, April 30, 2020. REUTERS/Paul Childs

A man cleans a royal mail post box painted blue in support of NHS and to celebrate 100th birthday of army veteran Captain Tom Moore ahead of the Royal Air Force (RAF) flypast over his house, as the spread of the coronavirus disease (COVID-19) continues, in Marston Moretaine, Britain, April 30, 2020. REUTERS/Paul Childs

A royal mail post box is painted blue in support of NHS and to celebrate 100th birthday of army veteran Captain Tom Moore ahead of the Royal Air Force (RAF) flypast over his house, as the spread of the coronavirus disease (COVID-19) continues, in Marston Moretaine, Britain, April 30, 2020. REUTERS/Paul Childs

A mobile Royal Mail Post Office is seen in Penrith, as the spread of the coronavirus disease (COVID-19) continues, Penrith, Britain, April 28, 2020 REUTERS/Lee Smith

A mobile Royal Mail Post Office is seen in Penrith, as the spread of the coronavirus disease (COVID-19) continues, Penrith, Britain, April 28, 2020 REUTERS/Lee Smith

A mobile Royal Mail Post Office is seen in Penrith, as the spread of the coronavirus disease (COVID-19) continues, Penrith, Britain, April 28, 2020 REUTERS/Lee Smith

A Royal Mail postman walks past a pub in York as the spread of the coronavirus disease (COVID-19) continues, York, Britain, March 31, 2020. REUTERS/Lee Smith

A Royal Mail train in Gateshead, as the spread of the coronavirus disease (COVID-19) continues, Gateshead, Britain, March 29, 2020. REUTERS/Lee Smith

A royal mail delivery van is seen driving on a road near Pitlochry as the spread of the coronavirus disease (COVID-19) continues, Scotland, Britain, March 28, 2020. REUTERS/Russell Cheyne

A Royal Mail delivery man looks at a "Closed" sign on a pub as he does his rounds, as the spread of the coronavirus disease (COVID-19) continues, in Richmond, London, Britain, March 24, 2020. REUTERS//Toby Melville

A Royal Mail van leaves Balmoral Castle, Scotland, Britain August 28, 2019. REUTERS/Russell Cheyne

Two passersby view a Royal Mail post box commemoratively painted following England's ICC Cricket World Cup victory, outside of Lord's Cricket Ground in London, Britain, July 17, 2019. REUTERS/Toby Melville

A woman posts mail into a Royal Mail post box commemoratively painted following England's ICC Cricket World Cup victory, outside of Lord's Cricket Ground in London, Britain, July 17, 2019. REUTERS/Toby Melville

Two passersby view a Royal Mail post box commemoratively painted following England's ICC Cricket World Cup victory, outside of Lord's Cricket Ground in London, Britain, July 17, 2019. REUTERS/Toby Melville

A woman runs past a Royal Mail post box commemoratively painted following England's ICC Cricket World Cup victory, outside of Lord's Cricket Ground in London, Britain, July 17, 2019. REUTERS/Toby Melville

A woman runs past a Royal Mail post box commemoratively painted following England's ICC Cricket World Cup victory, outside of Lord's Cricket Ground in London, Britain, July 17, 2019. REUTERS/Toby Melville

A Royal Mail van drives through the Drumochter Pass, Scotland, Britain March 11, 2019.REUTERS/Russell Cheyne

Scotland's First Minister Nicola Sturgeon poses for pictures inside a zero-emissions Royal Mail vehicle at the Scottish National Party's party's conference in Glasgow, Scotland, Britain, October 8, 2018. REUTERSRussell Cheyne

Britain's Prince William watches as UK Border Force officer scans incoming mail and parcels during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

Britain's Prince William watches as UK Border Force officer scans incoming mail and parcels during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

Britain's Prince William watches as UK Border Force officer scans incoming mail and parcels during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

Britain's Prince William watches as a UK Border Force shows off various items found recently, including snake skin, ivory and plants during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

Britain's Prince William talks to Royal Mail sorting office workers during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

Britain's Prince William watches as a UK Border Force shows off various items found recently, including snake skin, ivory and plants during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

Britain's Prince William talks to Royal Mail sorting office workers during a visit to the Royal Mail international distribution centre near Heathrow airport in Slough, September 6, 2018. Alastair Grant/Pool via Reuters

A Royal Mail post box is seen in Sonning, Britain, a village where British Prime Minister Theresa May has a home, July 8, 2018. Picture taken July 8, 2018. To match Special Report BRITAIN-EU/MAY REUTERS/Henry Nicholls

Moya Greene, CEO of Royal Mail, and Anthony Smurfit, CEO of Smurfit and Kappa, leave 10 Downing Street in London, Britain, May 30, 2018. REUTERS/Simon Dawson

Moya Greene, CEO of Royal Mail, and Anthony Smurfit, CEO of Smurfit and Kappa, leave 10 Downing Street in London, Britain, May 30, 2018. REUTERS/Simon Dawson

The Royal Mail Ship St Helena lies berthed in Cape Town harbour, South Africa April 17, 2018. REUTERS/Mike Hutchings

A Royal Mail postal worker stands in the yard of a sorting office in Altrincham, Britain October 12, 2017. REUTERS/Phil Noble

Royal Mail vans are parked in the Leytonstone post office depot in London, Britain early July 6, 2017. REUTERS/Russell Boyce

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge speaks with runners, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge poses for a photograph with runner Alex Stanley, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

Britain's Catherine, Duchess of Cambridge poses for a photograph with runner Alex Stanley, as she put a Heads Together headband onto the Kensington Palace post-box in support of the Royal Mail wrapping 70 post-boxes that line the 2017 Virgin Money London Marathon route ahead of a reception for Team Heads Together, at Kensington Palace, in London, Britain April 19, 2017. REUTERS/Chris Jackson/Pool

A postal worker for Royal Mail collects mail from a Pace village petrol station near Tonbridge, Britain October 10, 2016. REUTERS/Toby Melville

Cilene Connolly, 32, a Royal Mail postwoman, poses for a portrait during her postal round on a residential street in Coventry, Britain, February 24, 2017. "Fortunately, I haven't been faced with gender inequalities in my role as a postwoman," Connolly said. "I've had a great response from my customers for being a female delivering their post, women in particular are always pleasantly surprised to see a female face." REUTERS/Hannah McKay SEARCH "WOMEN WORK" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

An ornate Royal Mail post box with Post Office written on it in Liverpool, Britain, November 24, 2016. REUTERS/Phil Noble

An ornate Royal Mail post box with Post Office written on it in Liverpool, Britain, November 24, 2016. REUTERS/Phil Noble