Beeping Zafira - hxj

Twice this week I have turned the engine off, taken the keys out and had four loud beeps coming from the drivers side of the car as a response.

Any ideas as to what it might be trying to tell me?

Thanks
Beeping Zafira - Dynamic Dave
If it has a factory fit alarm, chances are the back up battery for it needs replacing. No idea where it is situated though.
Beeping Zafira - hxj

Many thanks.