My Audi lives to fight another day,
got 3 replacement relays for a grand total of £5 at local breakers, dried her out, removed dodgy grommets that are supposed to let water drain away but dont, recharged battery and away she went
Also the main problem was the cover for the ECU housing has been cracked, compromising the seal, someone in the past could not be bothered removing one of the screws that holds it in place as its a bit of a b###h to get at, so they just ripped it off cracking the cover
have drilled a 8mm hole now to let any further water penetration away and will source a replacement cover. Vorsprung durch Technik