Johnno has gave some spot on advice there!

I had a complete fuckin mission changing mine! Someone sold me one off here which looked nice but the return was blocked so was scrap and a waste of 50quid.... Another one wasn't even a cossie one

Then luckily i managed to get one of A.K.A (Paul) and it has been spot on!

DO NOT BUY A PATTERN ONE AS THEY ARE SHITE! They do not come with a swirl pot inside and will make the car miss and splutter when cornering hard with less then 1/4 full tank.

It's a complete wanker of a job changing one. Remember to purchase all tthe bolts/washer and the tank strap before you even attempt to change it! If the tank has not been off the car beofre i guarentee the bolts and clips will break and you'll end up cutting the tank off the car.....

The prices and part numbers are relisted below (not sure f they the same for 2wd)

Sierra Sapphire Cosworth (4WD)-Fuel Tank Strap
Part Number: 6161282
Retail Price: £15.32
You Pay: £13.79
Sierra Sapphire Cosworth (4WD)-Fuel Tank Strap Bolt
Part Number: 6185430
Retail Price: .85p
You Pay: .77p
Sierra Sapphire Cosworth (4WD)-Fuel Tank Strap Washer
Part Number: 1523201
Retail Price: .22p
You Pay: .20p

I got them all from www.fordpartsuk.com

Would recommend them to anyone.