Ok, Colin, here it is:
When did Sandown Park model show come to an end? That covered several modelling disciplines, was not hard to get to except for those living in the far north, and had easy parking.
Wings and Wheels has advertised their usual show in June at North Weald, hopefully there will be a few marine traders and exhibitors there to make the queue to get into the car park worth while (that was my experience some years ago).
I am in full agreement that muti-discipline shows are the way forward, even if the marine section is overwhelmed by the aircraft. We have a lot in common, including tools and materials. I am sure I am far from being alone in having spent a number of years flying models before returning to sailing them, so the displays are still of interest.