No I haven't noticed this in any of the Supermarkets I use. Waitrose (Frimley) Sainsburys (Burpham & Badshot Lea). But thanks for the info, I'll keep my eyes open.
I have to say that I didn't realise the scale of the problem. I just googled "food banks near me", and there are four in a 10 mile radius - Farnham and Fleet being the nearest to me and these are affluent areas. I shall be donating food from now on, now that I know where they are.