Wheel Issues

I just found that I have a bloody screw in my rear passenger tyre that's giving me a slow puncture, I looked at the spare wheel but that's shot as well as the hub is mostly rust and the tread is pretty bald. As I've got to replace at least one tyre is it worth trying to get the puncture repaired or is it better to try and find two new tyres?

Any tips on where to find some tyres and what I should expect to pay? I'm based in Leeds so I'm going to give the guy who breaks Hijets in Dewsbury a call but does anyone have any other ideas?

Cheers

Puncture repair depends where it is.
Near the wall or inside the "valleys" they won't do em.
If in the meaty bits.... Maybe.