Firstly I must thank Wino for the info that spurned me on to have a go at replacing this and the fact that VW wanted £400 plus to do it plus it saved a spares or repair project for Ebay.
It is a stupid decision to mount such a component which is likely to fail on such a strange unit. If yours has gone, give it a go. I think Fabia 1 have a different numbered relay but mine is a 2 and the relay is Omron G8NW-2U 12V DC. They do look the same. I ordered from China but it is marked Japan !!. Sor