Steering problem
2001 Fiat Ulysse

Wonder if anyone can help. I have recently purchase an 01 Ulysses, it is the first mpv that I have driven. I thought the steering issue was just due to being a bigger car but now I think it is probably a problem.
The problem is at its worse when driving at speed, when I steer right on a bend the car pulls back to the left. It is fine when driving slow(such as roundabouts). The car is fine when steering left.

Any ideas would be gratefully recieved.

Many Thanks