Is the other rear almost new? You might be better off selling the part worn and fitting all four new.
Mytyres are doing pretty good prices, but you might want to think about going non run flat at the same time. This price is fully fitted. I've used Hankook tyres on #69 and my S-Max and rate them.
Thanks Stu, yes the one is an almost new continental on the rear, the fronts are worn due to my my silly tracking I think! I can't afford very expensive kits on the car right now as need to get some other stuff done too. Also pretty sure the pot holes and rubbish roads here have ruined my suspension as got told the nearside suspension joint needs replacing.
Either replace with a match to the almost new, or sell the almost new one on here and replace all four. Whatever you do don't mismatch tyres.
If you took the plunge and got rid of the run-flats, which is never a bad idea, you'd save some money too. Falkens or Vredstein are both good budget brands.
It also sounds like you might need a 4 wheel alignment check.