The Queen was left intrigued by self-service checkouts during a visit to a pop-up Sainsbury's store this morning. The monarch, 93, was shown the technology during a visit to a central London shop, which has been built to celebrate the chain's 150th anniversary. She immediately wondered if customers were able to leave without paying, asking: 'You can’t cheat then?' When told that many shoppers enjoyed the convenience of the speedy checkouts, the Queen added: 'I'm sure they do. Everybody wants to hurry.' The Queen was talked through the technology of a self-service checkout during her visit today, pictured. A member of staff also showed the Queen an example of the retailer's reusable bags for life, which were introduced to reduce plastic waste The Queen was shown the technology during a visit to the pop-up Sainsbury's built to mark Sainsbury's 150th anniversary The Queen speaks to an actor in the role of an early Sainsbury's shopkeeper. The supermarket sold just butter, milk and eggs when it first opened its doors in 1869. The Queen's great-great grandmother Queen Victoria was on the throne at the time The Queen looks at meats on display during a visit to an old-fashioned butcher's counter on a visit to the London pop-up The Queen looked elegant in a mint green coat and matching hat for the outing in central London this morning The Queen flicks through a ration book like the ones that would have been used by Sainsbury's shoppers during wartime The Queen was also told how some shoppers can now use a phone app to pay without visiting the till. 'That’s an interesting tool,' she noted. The monarch, who last visited a supermarket with Prince Charles on a royal visit in 2016, appeared in excellent spirits as she arrived at the pop-up store. She donned a mint green coat and matching hat for the outing. The shop's exterior is designed to look like the supermarket's first branch, which opened its doors on Drury Lane in 1869. When it first opened, the shop sold only butter, milk and eggs. The Queen's great-great-grandmother Queen Victoria was on the throne at the time. The pop-up shop is designed to take visitors on a journey through Sainsbury's 150 year history. Pictured, the Queen exploring the space during her visit today. The monarch appeared particularly taken with the technology of the self-service checkout The Queen was left intrigued by self-service checkouts during a visit to a pop-up Sainsbury's store this morning The Queen looked at the sausages and bacon on display at one of the retro shop counters inside the Sainsbury's store The Queen, who does not go to the supermarket herself, was talked through the different sausages and bacon on offer Whole chickens, sticks of butter and tins of coffee were on display at this counter visited by the Queen this morning During her visit the monarch learned about the supermarket chain's history before making her way through to an area on current technology. She spoke to Damien Corcoran, a former Captain in the Royal Signals and a regional manager for Sainsbury’s stores in the north east of England. Mr Corcoran said that in his work he generally found there were two types of customers: those who embraced new technology quickly and were keen to use it, and others who needed a bit more help from staff. The Queen has taken a trip back in time with a visit to a replica of the first Sainsbury's supermarket. Pictured, the monarch speaks to actors in period costume The Queen walks through the doors of the pop-up shop, designed in a 1860s style The Queen spoke to actors in period costume as she left a replica of the early Sainsbury's store The monarch appeared tickled by the conversation and smiled broadly as they spoke The Queen was handed a beautiful bouquet of orange flowers as she left the replica store 'I think if I had seen the Queen in one of my stores in the north east of England I would have made sure I had assisted her,' he said. Among the guests at the event were a number of Sainsbury's staff, including those who have spent more than 50 years with the company and those who have made an impact on their community through volunteering or charity fundraising. Some of the oldest and youngest members of staff were also present. The Queen also unveiled a plaque at the site of the first store to mark the supermarket's 150th anniversary. In her long life the Queen has visited a number of supermarkets. She has been to Waitrose twice. The last time was in 2016 when she went to her son Prince Charles’s village Poundbury in Dorset. The Queen, 93, looked elegant in mint green as she arrived at the pop-up Sainsbury's on London's Drury Lane - the site of one of the chain's first stores The Queen is on hand to help the supermarket chain celebrate its 150th anniversary But they along with most other visits to shops have been on official engagements when the public had been cleared out. Off duty, she is sometimes thought to stop into shops in Ballater near Balmoral when she is staying on her Scottish estate. She once went for a walk around the duty free shops at an airport during a short stopover. It has already been a busy week for the Queen. On Monday evening she joined senior royals including the Duke and Duchess of Cambridge and the Countess of Wessex at the Chelsea Flower Show, where she was given a tour of the Duchess' garden. Yesterday she was once again joined by Kate and William as she welcomed hundreds of guests to a Buckingham Palace garden party. The Queen has already had a busy week of engagements and had another this morning Excited residents and workers hung out the windows to catch a glimpse of Her MajestyAll rights reserved for this news site dailymail and under his responsibility