No haven’t noticed in Tesco anyway
I haven't noticed and - when it comes to Tesco at least - I keep an eye on them. It's amazing how many errors you can find on the receipt; usually an offer that 'didn't go through'. When I complained, I was told the pricing system was in India or somewhere far-flung. I replied by saying that may well be, but it's strange how the errors always seem to be in Tesco's favour. Check your receipt!
The CSO, who survey thousands of prices in hundreds of shops in every county, haven't noticed it either.
Food and non-alcholic beverages [broken link removed]1.2% in the year to April.
Back in March multi-buy offers were largely cancelled to discourage stock-piling and panic buying. I am not sure to what extent they have come back.
Bit in general I find Supervalu worse at applying offers - current highly advertised offers especially.