[ZrByte]

Ok then so far the only thing I have managed to try is charging the battery. I gave it a full charge and noticed that the little status led is showing black (If I recall correctly Green = good, Red = Dead, Black = broken). I havent got access to a multimeter at the moment so theres nothing else I could really do asside form try it in the car.
Anyway I took it outside, put it in the car. The interior lights, dash electrics are working etc but when I try to start the engine the starter motor just spins, the engine doesnt even hint at starting (well actually it did once, a quick but louder click wich sounded much like the starter does when it actually works) sadly that was the most I got from it.

Also to answer a couple of other points, It has been standing for about 3 months, I haver been using it at least once a week to try and stop things like this happening and never had a problem (even last thursday wich was the last time it was used).
The only things I can think of that would have been drawing power from the battery all this time are the immobilisor and perhapps the blower if the contact isnt switching it off properly when the ignition is switched off (this was a fault when my dad bought the car but had been fixed and im sure this is still the case).