Just popped into my local Asda at Cardiff Bay. They had a rack of these Energizer Lithium batteries (AA or AAA) in a 50% extra free pack (6 for the price of 4) reduced from £7 to £3.97.
I assume it's national as the display didn't look like a local 'Managers Special'
Please don't start the rechargable debate or the 'Morrisons Super Special Cells buy 1 get 1000 free'. These are top batteries and will far outlast even the best Duracells. Ideal for cameras and high drain appliances or when replacing batteries is inconvenient.