After paying nearly 30 quid and waiting 4 days my header tank arrived at Allen Ford in Leamington Spa today....
Went to pick it up, it looked the same so I thought sweet as I will go back to work and fit it!
Take the old one out, drain all the coolant to put the new one in to find it is different

It is a bit deeper than the one that was on there and wouldnt fit in at all (it did but bonnet couldnt shut)
Phone up ford and all they could say is that I have the later RS turbo tank and an early RS turbo and because it was a special order item basicly there is nothing they can do even though the guy got my car up using my Reg number on the screen and ordered the wrong part
Am 30 quid down now with a header tank that doesnt fit my car and a split in the one on there.....fun
On with the search for a header tank....