woods at clipstone, notts charge £15 + vat for killing pigs. they kill pigs everyday, not sure if they still butcher it there. I get mine delivered from woods to a local butcher who charges me £20 to cut up a pig, its more if you wnat sausages making, meat curing etc.
Woods charged me £10 per lamb last time I had them killed. They only kill lambs on a Monday & Thursday. Again I get them delivered free to my local butcher.
Quite a trek from you but the prices are a lot cheaper