New old stock Halfords distributor cap HDC505 for many cars in the VW Audi Seat Skoda group between 1984 and 2005, used on engines with 1.1ltr, 1.2ltr, 1.4ltr and 1.6ltr capacities.
Do look at the pictures to confirm this is the one you need as it seems there are several similar caps. (if you can find a better price, I'll match it!)
Any questions please ask.