The original and probably most up-to-date version of this list can be found at Tims London Waterways Photos and has photos of many of the slipways, cranes and docks mentioned.
Kecksy’s Farm – River Lee
Andy Kecksy 07707025522
https://www.facebook.com/Kecksys/
High Line Yachting – Slough Arm
The Boatyard, Mansion Lane, Iver, Bucks, SL0 9RG
http://high-line.co.uk/our-locations/iver-boatyard/
sales@high-line.co.uk
01753 651496
P & S Marine – Grand Union, Cassiobury
Bridgewater Basin, Croxley Green, Watford, WD18 8SN
http://pandsmarine.co.uk/
tom@pandsmarine.co.uk
0800 170 7276 07956 333 892 (Ralph)
https://www.facebook.com/pandsmarine/
Lee Valley Marina - Stanstead Abbotts – River Lee
South Street, Stanstead Abbotts, Hertfordshire, SG12 8AL
https://www.visitleevalley.org.uk/en/content/cms/outdoors/marinas/stanstead-marina/
stansteadmarina@vibrantpartnerships.co.uk
01920 870 499
South Dock Marina – Tidal Thames
Lock Office, Rope Street , London’ SE16 7SZ
http://www.southwark.gov.uk/leisure-and-sport/south-dock-marina/boatyard-and-other-services
020 7252 2244
Enfield Dry Dock – River Lea
9A British Waterways Business Centre, Navigation Drive, Enfield EN3 6JT
http://enfielddrydock.co.uk/
07971 606414
St Pancras – Regent’s Canal
St Pancras Yacht Basin, Camley Street, London, N1C 4PN
http://dev.stpancrascc.co.uk/?q=contact
020 7278 2858 (Dry Dock Answerphone)
Bulls Bridge – Grand Union Canal
Bulls Bridge Docks, Willow Wren Wharf, Hayes Road, Southall, UB2 5NB
https://sites.google.com/site/bullsbridgedocks/home
bullsbridgedocks@aol.com
020 8569 2995
07724 983966
https://www.facebook.com/Bulls-bridge-docks-419771918109458/
MSO Brentford – Grand Union Canal/River Thames
Dock Road, Brentford,, Middlesex. TW8 8AG
https://msomarine.co.uk/home/dry-docking-wet-docking-tidal-grid-and-hard-standing/
info@msomarine.co.uk
020 8560 5159
Uxbridge Boat Centre
Waterloo Road, Uxbridge, Middlesex, UB8 2QX
01895 252019
Bulbourne Dry Dock
http://www.batesboatyard.co.uk/drydock.htm
info@batesboatyard.co.uk
01442 82225 07718 096557 (Jem Bates)
Hallingbury Marina – River Stort
Old Mill Lane, Gaston Green, Little Hallingbury, Nr Bishops Stortford, Herts, CM22 7QT
http://www.hallingburymarina.co.uk/dry-dock
info@hallingburymarina.co.uk
01279 723568
Aylesbury Canal Society – Aylesbury Arm
Circus Field Basin, Stocklake, Aylesbury, HP20 1AP
http://aylesburycanal.org.uk/
aylesburycanal@gmail.com
01296 252101
Cowroast Marina
Cowroast Marina, Wharf Lane, Tring, Hertfordshire, HP23 5RE
http://bwml.co.uk/cowroast-marina/
01442 825522 07941 240024 (Darren)
Harefield Marina
Moorhall Road, Harefield, Middlesex, UB9 6PD
http://www.harefieldmarina.co.uk/
info@harefieldmarina.co.uk
01895 822036
PLA Drying Out Facilities Isleworth & Strand On The Green
https://www.pla.co.uk/About-Us/PLA-Drying-Out-Facilities
07711 640095
Shepperton Marina – Cranage/Hardstanding to 22 Tons
https://www.sheppertonmarina.co.uk/marina-services/craneage-hard-standing/
Penton Hook Marina – 20 Ton Crane
Staines Road, Chertsey, Surrey, KT16 8PY
http://www.mdlmarinas.co.uk/mdl-penton-hook-marina/
01932 568681
Lots Ait/John’s Boat Works
http://www.lotsait.com/
john@johnsboatworks.com
020 3620 7314 07875 000465
4 All Marine
Harris Estate, Laleham Reach, Chertsey, Surrey, KT16 8RP
www.4allmarine.co.uk/
info@4allmarine.co.uk 01932 567744
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Featured video below - No Cash, No Splash: An Oral History of Boatyards on the Tidal Thames.
Working River heritage project film, 'No Cash No Splash: An Oral History of Boatyards on the Tidal Thames', produced by the Thames Festival Trust, made by arts and education charity Digital:Works, supported by a grant from the Heritage Lottery Fund.