A Royal Mail postman makes a delivery in Pitlochry, Scotland, Britain December 17, 2022. REUTERS/Russell Cheyne 

A Royal Mail postman makes a delivery in Pitlochry, Scotland, Britain December 17, 2022. REUTERS/Russell Cheyne 

A person holds a placard as Royal Mail workers strike over pay and working conditions, outside of the Buckingham Palace in London, Britain, December 9, 2022. REUTERS/Toby Melville 

A man wearing Christmas themed clothing holds a placard as Royal Mail workers strike over pay and working conditions, outside of the Buckingham Palace in London, Britain, December 9, 2022. REUTERS/Toby Melville 

People hold placards as Royal Mail workers strike over pay and working conditions, outside of the Buckingham Palace in London, Britain, December 9, 2022. REUTERS/Toby Melville 

A Royal Mail worker holds a toy depicting Postman Pat as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

A demonstrator hold a placard depicting CEO of the Royal Mail Simon Thompson as members of the Royal Mail strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

A Royal Mail worker holds a toy depicting Postman Pat as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

A Royal Mail worker holding flags is silhouetted as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Royal Mail workers protest as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers hold placards and flags as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers stand under a giant flag as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers stand under a giant flag as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Royal Mail workers protest as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers hold placards as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers hold placards as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers hold flags and placards as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

Royal Mail workers protest as members strike over pay and conditions, outside of the Houses of Parliament in London, Britain, December 9, 2022. REUTERS/Toby Melville 

A Royal Mail flag flies near a sorting office as workers strike, in west London, Britain, November 24, 2022. REUTERS/Toby Melville 

A Royal Mail worker strikes near a sorting office in west London, Britain, November 24, 2022. REUTERS/Toby Melville 

Royal Mail workers strike near a sorting office in west London, Britain, November 24, 2022. REUTERS/Toby Melville 

Detail on a post box is seen as Royal Mail workers strike, in west London, Britain, November 24, 2022. REUTERS/Toby Melville 

Detail on a post box is seen as Royal Mail workers strike, in west London, Britain, November 24, 2022. REUTERS/Toby Melville 

Royal Mail workers strike outside of the Richmond Delivery Office in London, Britain, November 24, 2022. REUTERS/Toby Melville 

A Royal Mail worker strikes outside of the Richmond Delivery Office in London, Britain, November 24, 2022. REUTERS/Toby Melville 

Royal Mail workers strike outside of the Richmond Delivery Office in London, Britain, November 24, 2022. REUTERS/Toby Melville 

The royal cypher of Britain's Queen Elizabeth is pictured on a Royal Mail post box on a street in London, Britain August 26, 2022. REUTERS/Maja Smiejkowska 

A Royal Mail post box pictured outside a post office, in London, Britain August 26, 2022. REUTERS/Maja Smiejkowska 

A Royal Mail post box is pictured on a street in London, Britain August 26, 2022. REUTERS/Maja Smiejkowska 

A Royal Mail post box is pictured on a street in London, Britain August 26, 2022. REUTERS/Maja Smiejkowska 

A Royal Mail sign is pictured outside a post delivery office, in London, Britain August 26, 2022. REUTERS/Maja Smiejkowska 

A Royal Mail worker makes deliveries in the planned community of Poundbury, built on land owned by, and with the design approved by Britain's Prince Charles, on the outskirts of Dorchester, Britain, August 19, 2022. REUTERS/Toby Melville 

Cycling - Tour de France - Stage 19 - Castelnau-Magnoac to Cahors - France - July 22, 2022 Daily Mail Princess Marie and Prince Joachim of Denmark are seen at the finish line after stage 19 REUTERS/Christian Hartmann 

A postal worker makes a delivery in London, Britain, July 21, 2022. REUTERS/Peter Nicholls 

Senior presiding officer and polling station manager Teresa McCurdy prepares to put a ballot box in Royal Mail van driven by her postman husband Noel, a day ahead of the Northern Ireland Assembly elections, that she brought by ferry to Rathlin Island which has a population of around 150 people, off the coast of Northern Ireland, May 4, 2022. REUTERS/Clodagh Kilcoyne 

A Royal Mail sign is pictured on a post box outside a Post Office, in St Albans, Britain, May 3, 2022. REUTERS/Peter Cziborra 

A Royal Mail sign is pictured on a delivery van outside a Post Office, in St Albans, Britain, May 3, 2022. REUTERS/Peter Cziborra 

A Royal Mail sign is pictured on a post box outside a Post Office, in St Albans, Britain, May 3, 2022. REUTERS/Peter Cziborra 

Britain's Prince Charles poses for a photograph with the national winners of Royal Mail's 'Heroes of the Pandemic' stamp design competition at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Alfie Craddock,12, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Alfie Craddock,12, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Isabella Grover, 7, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Rafi Valle Martin, 14, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Jessica Roberts, 15, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Ishan Baines, 7, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Jessica Roberts, 15, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Isabella Grover, 7, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Logan Pearson, 11, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

Britain's Prince Charles meets Shachow Ali, 11, a national winner of Royal Mail's 'Heroes of the Pandemic' stamp design competition, while viewing the winning designs at Clarence House in London, Britain March 10, 2022. Kirsty O'Connor/Pool via REUTERS 

A knitted figure of children’s character Postman Pat is seen on top of a Royal Mail post box in Liverpool, Britain, September 22, 2021. REUTERS/Phil Noble 

A knitted figure of children’s character Postman Pat is seen on top of a Royal Mail post box in Liverpool, Britain, September 22, 2021. REUTERS/Phil Noble 

Royal Mail delivery arrives at Windsor Castle after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain April 12, 2021. REUTERS/Peter Nicholls 

Royal Mail worker waits while a volunteer gives a resident a coronavirus disease (COVID-19) home test kit in Ealing, West London, Britain February 3, 2021. REUTERS/Henry Nicholls 

Britain's Prince Charles visits Royal Mail's Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS 

Britain's Prince Charles meets with employee Catherine Griffiths as he visits Royal Mail's Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS 

Britain's Prince Charles meets with employee Mark Gardiner (R) as he visits Royal Mail's Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS 

Britain's Prince Charles helps to sort the mail on a visit to Royal Mail's Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS 

Britain's Prince Charles helps to sort the mail with Royal Mail employee Mark Messer (R) on a visit to Royal Mails Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS 

Britain's Prince Charles meets employee Sarah Burton on a visit to Royal Mail?s Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS 

Britain's Prince Charles helps to sort the mail on a visit to Royal Mail's Delivery Office in Cirencester, Britain December 18, 2020. Geoff Caddick/Pool via REUTERS