so yeah, the alarm didnt used to go off but now it does. mate who used to own it is os, is there usually a remote? or is dthe alarm de-activated another way? is there a way around it?
cheers

dude, i dont think anyone is going to tell you how to bypass security on a public forum.... plus we dont even no what alarm it is to try and help via PM

fair enough. if anyone can help out via pm that would be appriciated

I had a similar issue last year and recently especially when hot. The alarm was being triggered by the boot switch. It appears that closing the boot too gently does not close it tight enough. When the car was in the sun and got hot the alarm would sound. Closing the boot firmly fixed the problem.
Not sure if that is what your after but solved my problem.