M&S have now started selling food which goes out of date that night at a reduced rate. I was in shopping tonight and saw a number of items with 'reduced' stickers and asked an assistant what it was about.
She told me that it started this week and food is reduced late on in the afternoon. She said it is a staggered reduction system but most things are roughly half price.
Seems hot to me.
(This is a trial in Scotland and N. Ireland and if successful, will be launched elsewhere.)