Indeed they do at the moment. The Key being from no EU. I've written a couple of stories not published on the ramifications of customs work. But lets be fair when we were younger some would head for the first rubber ring shop that could be found at the seas side but it was always on the understanding they were for Local use largely for kiddies and there was was always some fuel caught on a Lilo and I'm not crass enough to blame every Frog for everything.
But that never stopped the average yachtee from popping orf to the Continent and laying in cheap booze for crawling round the Cote Azur and the returning with a cherubic grin on his/her face as they had nothing to declare on their return "ahem". TBF Marinas were not first port of call with existing staff. "One trusted one's betters in those days" fools of tooks as we were.
But to give it another slant. Two Rozzers crossed my morning walk yesterday and they were monitoring the misuse of a No left turn. Far too parochial to pop into the local Marina and inspect the comings and goings. But then that's not their job is it and "we only do things when intelligence says we should" rather sums it all up. It's all a bit NAAFI.
if you live on the south Coast and take an interest in the seas coming and goings, one of the things you notice, Is the regular fast boats heading off out to sea as the light fades, they come back by dawns early light. recreational People smuggling has been a thing for a very long time.
it’s low/no risk. No ones watching, if you go down to the harbour, there is a smalll faded sign with the numbers to call if you arrive and need to declare anything - that’s the sum total of ‘border protection’ round here,