Just a thought and a bit of a long shot that is probably unlikely to get a much of a response but...
Are there any submerged site in the UK that are explorable using snorkling or scuba equipment?
I am thinking of such places as man made lake or naturally flooded areas that are now permanently underwater.
Are there any people that do underwater archaeology on here, even reletively recent stuff (cover your ears/eyes TMA Eds).
It is something I have been interested in for years and was wondering if it was a viable hobby?
:o)
Chris