Central locking problem

I just wondered if anyone has had problems with central locking on their 110? I have a '62 plate but on a couple of occasions (both have been during cold icy weather) when going to unlock first thing in the morning the system has what can only described as a fit and starts rapidly unlocking/locking. The only way to stop it is to wait until it unlocks and quickly open the door before it gets a chance to lock again. Once the engine turns over things seem to be fine again.

Presume it's an intermittent wiring fault which must be linked to it being cold and frosty but wonder if anyone else has experienced this and if so is there any fix I can do?

Many thanks.