update, starting to piss me off now
earthed the blue wire and turned the ignition on and my battery light comes on.
so i take the alternator to a place that specialises in that shit and they said theyll test it and ring me back.
couple hours later they ring and say theyve managed to fix it theyve put a new regulator on for £30 and its working fine.
so i go get it wire it up to the car and no fucking battery still
wtf!!

just took it back to them to test again because i cant think wtf else i can try