Hi after doing some investigation found that the prob lay in the central locking module so had found a replacement but was having issues as the battery was being flattened overnight ,so was disconnecting battery at night and at work , on monday had trouble reconnecting and the central locking went on and off a couple of times in a few seconds because of the battery being connected and disconnected since then have had no problems I assume the on off on off on has freed the micro switch that was causing problems ,6 days and counting everything ok