Hazard light / alarm fault?

Hi, I'm new to this but looking for help with randomly flashing hazard lights when my 97 Disco is parked and locked. Any body experienced this before. Local 4x4 garage has not found fault which seems to happen totally at random.

My stock alarm has the flashers go off when its set. So it would have to have something the do with the alarm brain I would guess.

Could be an intermittant earthing fault?

Any suggestions where I could start looking?

if it flashes 3 times after locking it is the remote fob battery

Does the horn go off when flashers go,does the alarm operate correctly lock leave window open open door from inside does the horn and flashers go off,tiga

Once locked the hazards flash three times as if to arm the alarm. Then after a period of time, can be immediate or could be a day the hazrd lights flash randomly, but with no horn sounds. I have tried opening a door from inside when alarm set and no alarm sounds. Liverage 4x4 could find no fault but it did not do it whilst with them - Typical!