hi guys sorry i forgot to post up what happened.i bit the bullet and bought a new pump from ford.when i removed the old pump the filters on the bottom and inside were absoloutely solid with shit and gunk.they were that bad that i was suprised the car ran at all..honestly.
so fitted new pump and car sorted and obvoiusly runs great.ive cleaned the filters on the old pump and am confident that was the only thing causing the hesitstion.
so in conclusion just fit a new pump or if your skint clean the pump filters,i know its hassle removing the tank ,but if you save £200 its gotta be worth it.

cheers Glyn