Not sure about meals, but can do ingredients!!
Tinned and frozen veg are much cheaper than fresh (less wastage too!!)
Supermarket own brand equivalents of cereals, biscuits, beans etc
Own brand diet pop saves my day regularly
Tinned fruit (in juice, and drained before eating) is free
Poundland often has WW crisps, and cakes in...for £1!!!
Morrisons currently has all of it's 'eat smart' meals for half price - so between 75p and £1.50 each
Go to supermarket at end of the day, buy all the reduced veg to make a big veg soup, I have manage 8 portions before for under £2
Buy reduced (almost at sell by date) bread, freeze on day or purchase in 2 slice portions, lasts weeks!!
If your grapes, bananas, strawberries, yogurts are going off, freeze them, they're all lovely and are a bit like having an ice cream or sorbet!!
Supermarket own yogs, cheese etc
I'm a big fan of Aldi's super 6 fruit n veg offers
HomeBargains often has WW bits and basic ingredients on offer
Batch cooking stuff you get on offer can get loads of portions on a budget
Some people try to have a few veggie days/meals per week, lowers the cost and the pp values
Tesco value, asda smartprice, sainsburys basics are your friend!!
Some people use mysupermarket.com and other comparison sites to check out where's cheap to shop each week
Hope this helps a little?!