Hello Shaun,
This is only from memory but does this flavour of Alfa have an immobiliser code card system like Fiat's of that age 4 digit PIN I think, if so you can use that to get the car started.

I would also check the engine fuse box for the relay spades backing out of the relay spades and fuses come to that (it's a Fiat thing!!) For my sins I'm blessed with a Works Fiat Doblo

I don't know the resistance of the key coil but they are known to give problems.

Ian