Thank you all for your replies. I suspected that getting a mooring 1st would be the better way to go. Not having the benefit of what has gone before I find it strange that mooring can effectively be passed on with the sale of a boat, something that is not actually owned and yet has value. I'm surprised also that landlords allow this and presumably don't even get a cut.
I saw a 37ft boat that was for sale which was very basic being sold for 45k. I would have thought the boat has a value of about 25k so would it be fair to say that the mooring represents 20k of the purchase price? This was a London mooring which are something of hens teeth it would appear! Anyway enough mutterings from me, thanks again and I look forward to the day I can enter the fold.
Dave