Thanks, will do
Recent hot, hot weather helped to dry the car out - plus a towel wedged under the driver's floor carpet!! (Thought I saw fish swimming under there!)
Boot button still works.
More on the door latch issue
The "original" door latch was giving rise to spurious random central locking operations - so I swapped it out for a replacement 2nd hand unit - but that appears to be 100% duff. Frankly no idea where to start with it. Did wonder if I could make a good one out of the old one and the its replacement... But knowing what a ball ache it is to remove and replace, have been stalling on the operation.
All words of wisdom gladly received.