Welcome!
Well, if you're at Selsey you have one of the UK's best shore dives on your doorstep - the wonder that is the Selsey Lifeboat Station.
You also used to have a corking RIB operator working off the beach, but he moved to Portland. (Who is taking over Dave's patch btw?)
Loads of us know that area as we love it so much - there's a load of good diving down there. Not least a load of decent skippers - most who post on here too (See above
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Oh - and as for a Drysuit - Go for Made to Measure when you buy one - it's guaranteed to fit and it's worth the extra dough initially. You won't regret it!
Mark.