Its a 2001 Vauxhall Astra.
I think that it has had a decent system in it as there is a lot or wiring in boot for a sub I would guess.
Someone has now fitted a knackerered head unit,that works sometimes.At the moment it doesn't work at all.There is a cable underneath that I was told was for an i pod.
I think it probably needs a different wiring loom or something,as I now have a Blaupunkt Radio cassette. (old but comes with handbook)
I won't try and do it myself as I am sure to cock it up!