Marinas, Yacht Harbours, Berths and Moorings - UK
http://www.marina-info.com/minfo/uk/realukindex.htm

Marinas & Moorings
http://www.marinedata.com/

Welcome to MDL Marinas
Whether you’re a racer, family sailor, motor cruiser or river boater, we have one aim: to enhance your whole boating experience. Our marinas provide far more than a secure place to berth your boat.
http://www.mdlmarinas.co.uk

Ports, Harbours & Marinas
http://portfocus.com/united_kingdom/index.html

Ports Directory - UK - Ports.com
http://www.ports.com/

Home of the finest Marinas in the UK - Premier Marinas
Premier Marinas is the owner and operator of seven of the UK's most prestigious marinas - Beaucette Marina (Guernsey, Channel Islands), Brighton Marina (East Sussex), Chichester Marina (West Sussex), Falmouth Marina (Cornwall), Port Solent Marina, Southsea Marina (Portsmouth, Hampshire) and most recently Gosport marina in Hampshire.
http://www.premiermarinas.com/

Royal Yachting Association - Search for Marinas
http://www.rya.org.uk/marinas/

Local Info and Marinas - UK Sailing Index
http://www.uksail.com/localorg.htm

Yacht Havens - Marinas - UK
The Yacht Havens Group owns and manages marinas around the British Isles - Scotland, Wales, and on the South Coast of England. Our customers enjoy the same high standards of facilities regardless of which of our marinas they're in.
http://www.yachthavens.com

The YBW Marine Directory - UK Marinas
http://www.ybw-directory.com/

Marinas - Yell.com
http://www.yell.com/

Port, Harbour & Dock Authorities - Yell.com
http://www.yell.com/