Main London
marinas are: St Katharine's, South
Dock, Limehouse Basin. Otherwise the alternatives include The River Medway and the Essex/Suffolk rivers, all within easy train ride of London.
Your best bet would be to buy a copy of The
East Coast Pilot
East Coast Pilot Also a copy of Reed's Almanac is invaluble, it is stuffed with information and covers coastal
Europe from the tip of Jutland to
Gibraltar.