Hi Ian.
Autodata produce a good timing belt book but it won't be cheap!!!!
They are not a bad belt to do as long as you have previous timing belt experience. What you can find with the belt on the UNO diesel is that you have to put the belt on with the pump timing a tooth out. Then rotate the engine by hand twice and it should then be aligned properly.
I would just like to add though that I wouldn't recommend changing the belt yourself unless you have done a few in the past. They can be very expensive if you get them wrong.
Mick