Agreed-- I bought the same offer, a large joint of beef, parmentier potatoes, profiteroles and wine at £6.99 a bottle. My bill showed that I had saved £10 on a £15 buy. We don't either of us drink, but the wine always comes in for friends and gifts. The rest of the food did for 2 meals and some very tasty beef sandwiches.
On Tuesday I got 2 chickens for £7, cooked and dismembered them both, made 3 chicken bakes for the freezer, we have had 2 meals from the white meat, the dog will have 4 from the 'funny bits' and there is still an awful lot left. ---And my OH eats alot of meat as he doesn't like veg !
Then I read what people spend on takeaways!
Perhaps it is my Yorkshire nature, but not much gets wasted in our house !