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 !!. Sorry no pics but Wino has some. Photo the unit blocks before you pull them off as the unit is tucked away on the rhs of the drivers footwell. It comes apart really easily. Wino shows where the relay is and with some Desoldering wire, soldering iron and solder it's a 15 minute job replacing it. I can't thank him enough so don't be put off. I should have done pics but he has already done some.