What’s worth £99.2bn a year according to one trusted source and £147bn to another? The UK grocery market. Some sources rely on EPoS (electronic point of sale) data – every transaction a retailer has made – but Aldi and Lidl famously don’t share this data, leaving out a huge chunk of the market. Others rely on consumers scanning barcodes of items they’ve bought, but this only covers products that are brought home after purchase and excludes products consumed outside the home after purchase.