Alarm help needed.

[Cooper B5.5TDI]

I have a sudden alarm issue and need help to fix it or quieten it down....

Only known issue I can think of is the dead rear passenger door....but the car alarm has worked fine for nearly a year with this issue...

It's all of a sudden started going off at random times....anyone have any advice on what to look for?

And failing that....is there a dedicated fuse to pull out for the alarm?

Any help would be great, thanks!