A customer is seen at the self scan checkout in a Sainsbury's supermarket in Harpenden, following the outbreak of the coronavirus disease (COVID-19), in Harpenden, Britain, June 12, 2020. REUTERS/Peter Cziborra 

A member of staff is seen behind a screen at the checkout in a Sainsbury's supermarket in Harpenden, following the outbreak of the coronavirus disease (COVID-19), in Harpenden, Britain, June 12, 2020. REUTERS/Peter Cziborra 

A staff member is seen cleaning a protective screen by a checkout in John Lewis in Kingston upon Thames as the store is being prepared for reopening following the outbreak of the coronavirus disease (COVID-19), Kingston upon Thames, Britain, May 29, 2020. REUTERS/Peter Nicholls 

A staff member is seen cleaning a protective screen by a checkout in John Lewis in Kingston upon Thames as the store is being prepared for reopening following the outbreak of the coronavirus disease (COVID-19), Kingston upon Thames, Britain, May 29, 2020. REUTERS/Peter Nicholls 

A staff member is seen cleaning a protective screen by a checkout in John Lewis in Kingston upon Thames as the store is being prepared for reopening following the outbreak of the coronavirus disease (COVID-19), Kingston upon Thames, Britain, May 29, 2020. REUTERS/Peter Nicholls 

A dedicated NHS checkout is seen at a Waitrose supermarket in Berkhamsted, Britain March 24, 2020. REUTERS/Paul Childs 

A dedicated NHS checkout is seen at a Waitrose supermarket in Berkhamsted, Britain March 24, 2020. REUTERS/Paul Childs 

Taped-off areas for customers to distance themselves from each other are seen at the checkout area of a local Tesco store as the number of coronavirus disease cases (COVID-19) grow around the world, in London, Britain, March 21, 2020. REUTERS/Toby Melville 

Taped-off areas for customers to distance themselves from each other are seen at the checkout area of a local Tesco store as the number of coronavirus disease cases (COVID-19) grow around the world, in London, Britain, March 21, 2020. REUTERS/Toby Melville 

Taped-off areas for customers to distance themselves from each other are seen at the checkout area of a local Tesco store as the number of coronavirus disease cases (COVID-19) grow around the world, in London, Britain, March 21, 2020. REUTERS/Toby Melville 

Taped-off areas for customers to distance themselves from each other are seen at the checkout area of a local Tesco store as the number of coronavirus disease cases (COVID-19) grow around the world, in London, Britain, March 21, 2020. REUTERS/Toby Melville 

Britain's Queen Elizabeth stands next to a self-service checkout machine inside a replica of one of the original Sainsbury's stores in Covent Garden on the occasion of their 150th anniversary in London, Britain May 22, 2019. Jeremy Selwyn/Pool via REUTERS 

Britain's Queen Elizabeth chats next to a self-service checkout machine inside a replica of one of the original Sainsbury's stores in Covent Garden on the occasion of their 150th anniversary in London, Britain May 22, 2019. Jeremy Selwyn/Pool via REUTERS 

Britain's Queen Elizabeth looks at self-service checkout machine inside a replica of one of the original Sainsbury's stores in Covent Garden on the occasion of their 150th anniversary in London, Britain May 22, 2019. Jeremy Selwyn/Pool via REUTERS 

A logo is seen on the screen at the checkout of Tesco's new discount supermarket Jack's, in Chatteris, Britain, September 19, 2018. REUTERS/Chris Radburn 

An employee works on a checkout till at the Asda superstore in High Wycombe, Britain, February 8, 2017. REUTERS/Eddie Keogh 

A shopper carries his bags from the checkout as he leaves the Tesco store in Gorton, Manchester, northern England, January 13, 2009. Tesco Plc reported the smallest rise in Christmas sales at UK stores open at least a year since the early 1990s, as Britain's biggest retailer felt the impact of the economic downturn. REUTERS/Phil Noble (BRITAIN) 

A worker scans items at the checkout at a branch of British supermarket Sainsbury's in Manchester, northern England, September 15, 2008 REUTERS/Phil Noble (BRITAIN) 

A shopper leaves the checkout at a branch of British supermarket Sainsbury's in Manchester, northern England, September 15, 2008. REUTERS/Phil Noble (BRITAIN) 

Samantha Fisher plays with an American flag at the checkout of the new Asda Wal-mart supercentre in Bristol, July 24, 2000. The opening of the store is expected to create a price war within the retail market. Wal-Mart's Asda said on Monday it would create 3,000 new jobs in Britain by opening 10 Asda Wal-Mart supercentres over the next five years. 

Samantha Fisher plays with an American flag at the checkout of the new Asda Wal-mart supercentre in Bristol, July 24, 2000. The opening of the store is expected to create a price war within the retail market. Wal-Mart's Asda said on Monday it would create 3,000 new jobs in Britain by opening 10 Asda Wal-Mart supercentres over the next five years.

JE/WS 

The first sales are cashed through the checkout counters of the new Asda Wal-mart supercentre in Bristol, July 24, 2000. The opening of the US super store is set to start a price war within the retail trade in the UK. Wal-Mart's Asda said on Monday it would create 3,000 new jobs in Britain by opening 10 Asda Wal-Mart supercentres over the next five years.

JE/WS 

Dr George Mathewson, Chief Executive of The Royal Bank of Scotland (L), Peter Wood, Chief Executive of Direct Line (2nd L), Terry Leahy, Tesco Chief Executive (2nd R) and Mike Ross, Chief Executive of Scottish Widows pose for photographers at a Tesco checkout February 13. It was announced today that Tesco and The Royal Bank of Scotland have agreed to establish a joint venture in financial services.

BRITAIN TESCO