Sorry for late reply ford price is £38.66 + vat but the part number is 87YF6C315AA or finis number is 6181945
Like this one http://www.ebay.co.uk/itm/T-FORD-PARTS-Ford-Escort-Cosworth-CPS-Crankshaft-Position-Sensor-FINIS-6181945-/150662269102?pt=UK_CarsParts_Vehicles_CarParts_SM

The other one is not right for my car 94 Small turbo cosworth.
Dan

Edit: Did not get one in the end as took old one off and checked resistance and nothing wrong with it, getting my car pluged in at ford today to see if they can read it.