as long as your fuel lines are all good and tight and put two new clear fuel filters (under 2 quid each + fuel line clips 25p each) in (one before the pump, one between pump and carb), get someone to crank it over for a minute when you watch the filters, if you get fuel in a filter, your pump works.
I have also put one on the return line, I had a split in the top section of the pipe and didn't want to replace the whole thing until I change the tank (tomorrow!! cheers Stuey (again)), so I used a spare filter as a join in the pipe. I have found that this lets me see how much extra my pump is pumping (seems a bit much at the mo, may increases the gasket size under the pump), will be leaving it in now.
Marc