One tip is to go to the supermarket later in the evening (at least after 7pm, if not later) when they're doing their final reductions - if you're lucky you can get some AMAZING bargains. The amount of times I've been in and got meat for 30p/pack, or WW ready meals for 19p ...
Whatever cheap meat you can get, take it home and bulk-cook something with it - chilli, curry, stew ... Then pot it up and freeze it - you can get 10 plastic pots for a £1 from certain pound shops, and you can re-use them over and over.
If you're buying 'full price' meat though, probably the best value thing to get is diced turkey thigh - it's about £4.50/kg. You might have to spend 10 mins just trimming off the fat a little though. Funny thing is, it's always reduced at my local morrisons in the evening!
I wish I could even check out the 'local' butchers, but there isn't one nearby. There's one in the town joined on to mine, I'll be honest it's only 5 mins drive down the road, but even then I work full time so I do my shopping on weekday nights. Usually have enough in for the weekend that I don't need to go to the shops so there would be no point checking out the butchers!
But I'm a bargain hunter really, I only buy stuff on offer or where it's cheapest, and I go to different supermarkets based on what offers they have and what I want/need. Barely spend more than £20 in one shop.