LH119V
Thanks so much for the reply.
I appologise as I have already managed to replace the belt, and should have updated this thread but didnt.
You are correct, there appears to be lots of size adjustment on the pully, so I beleive a number of closely sized belts would fit.
For info I went for a Gates FleetRunner AVX13x1250HD V-Belt, which cost approx £10 and works a treat.
Thanks again