Well, you have to be clever with meal planning and yes, you might have to have the same sort of meat two days in a row. Might be boring, but it's not wasteful.
1 whole chicken
1 roast for 2 people (with potatoes, rosemary, carrots, and parsnips - or whatever your choice of veg is, or whatever you've got leftover from previous week - all can potentially be grown at the right time of year).
1 curry for 2 people - (requires some spices to be bought, maybe cream depending on your choice of curry. once spices are bought will serve for a long time. can buy things like cinnamon pods for £2 a 500g in local asian shops - never been in a town where there isn't one!)
1 chicken pasta bake with leftovers from roast (that weren't used for curry - if you don't have cheese, this can be very cheap).
1 soup with 4 portions from the carcass (again - if you grow veg and herbs this could be very very cheap to make)
desserts like apple crumble and blackberry pie can be made very cheaply if you live rurally and can pick bushes and trees - you could trade for neighbours, pick apples for them if they give you a bag.
you need to be creative, but it's possible to eat well relatively cheaply - if you don't have a garden to grow things, you could have a windowsill box instead for herbs. Make friends with people who have plots and buy local fruit and veg.