First off, the picture isn't the actual product - but it's like this.
I was in my local M&S Simply Food today - saw a promotional box with these two-piece carving sets. They have a sticker on them stating 'FREE with any two Ready to Roast Joints - while stocks last. Normal Price £4.99'. Another green sticker says 'Outstanding Value - see price ticket for details.'
I was about to ignore it as I didn't need two Ready to Roast joints, but then I noticed that the shelf ticket price was just 99p! I bought the last one in the store, but there should be more available at other stores.