In a shop stacked to the ceiling with toys, Brenda Cleaver is searching for a very specific car. “I am looking for a modern road vehicle, and I am checking the price. Here it is. It hasn’t changed,” she says, comparing the price sticker on the toy car with the information on her handheld computer. She moves on in search of a snakes and ladders game. Cleaver is one of hundreds of people across the UK who help collect thousands of prices each month to feed into a national basket that keeps track of the country’s inflation rate. These field workers look for the same items in the same stores each month and send their prices to the Office for National Statistics (ONS) in Newport, Wales.