DMU Groups
101 692 located at the Midland Railway Butterley
Barry Railcar Project have a Class 108, 115 & 117
Cheddleton 104 Group on the Churnet Valley Railway
Class 107 Ltd Owners of the set on the Embsay Railway
DMU Group (West Midlands) have five Class 108 cars on the Severn Valley Railway
DUPA Diesel Unit Preservation Associates, owners of 101s and 108s at the East Anglian Railway Museum
EM2 Locomotive Society look under stocklist for details and a restoration diary of Drewry Car DB998901 'Olive' at the Middleton Railway
Helston Diesel Group have a Class 103 at Gwinear Road Station
Llangollen Railcar Group An excellent site with a great collection of restoration and at work pictures
North Yorkshire Moors DMU Group who have 101 680
Midland Railway Trust Railcar Group details of their 114 and 127, and other DMUs on site
Nottingham Transport Heritage Centre Ruddington's "Ramrail" DMU Group, with details also on the GCR 101
Swindon Diesel Preservation Society look after the Class 126 Inter-City DMU
Williton Traction Groups has the Class 103 on the West Somerset Railway
Wickham Railbus - the former Elliot Track Recording Coach on the Middleton Railway

EMU Groups
Hampshire and Sussex Units Preservation Society Limited (H&SUPS)
The Southern Electric Group exists to promote interest in the electric railway system of the Southern Region and its successors. A companion group, the Southern Electric Heritage Limited own the 5 4Cor vehicles
Suburban Electric Railway Association Interested in Southern units

Yahoo MU Groups
101DMU - "This group is for anyone interested in Class 101s (Metro-Cammell built diesel railcars). Anything relevant to these trains is welcome. Other types of first generation DMU are also acceptable. Report all your sightings, and share news, information, photos and opinions."
1st-gen - "1st-gen is a forum for owners and operators of 1st-generation DMUs (and anyone else interested). Particular topics are requests for information / technical help and parts for sale / wanted."
mueg - "MUEG is an E-mail group for people interested in Multiple units of all types, ie EMU DMU DEMU. We cover both old and modern, and also heritage railways which these are used on."
Blue Pullmans - "A group for anyone interested in the erstwhile British Rail Blue Pullman sets which operated between London and Manchester / Birmingham / South Wales."
Thumpergroup - "A group set up in April 2004 to follow the last days of the thumpers. There are listings of all extant thumpers, including preserved and still in capital stock. Regular updates of daily working of 205's and 201 are reported. For all things thumper!

Miscellaneous MU Sites
Blue Pullman The 1960 BTF title, "Blue Pullman" has its own page and features screen grabs of this hugely popular title, the rest of the site deals with the other British Transport Films.
www.class101.co.uk Self explanatory?
The Central Highlands Tourist Railway operate and manage a 10km section of the former Daylesford branchline, located in Victoria, Australia with one of their main objectives being the preservation of ex Victorian Railways (VR) railmotors.
Multiple Units Ian Jessop is the new webmaster of a site originally started by Dave Root.
Derby Lightweight Keith Norgrove's early 1950s DMU promotional material
European Railway Picture Gallery Extensive archive of 1st Generation DMU pics (plus much more!)
The German Railbus - Our continental friends have this site about a historic German Railbus - and it's in English!
Lincolnshire & East Yorkshire Transport Review has an article on 105, 114s, DMUs to visit Skegness, and much much more on transport in the area!
Preserved Carriage Database which lists and has comprehensive details on the condition of all DMU vehicles
The Rail Motor Society a group dedicated to preserving rail cars of the NSW Government Railways in Australia
www.rrhistorical-2.com/frm/roster/selfrostr.htm and http://members.aol.com/lsenker/prsl.html - look at the Budd RDC (Rail Diesel Car) which became the standard DMU in Canada and the USA
www.stormshadow.co.uk/101-index.htm These pages look at the 101s and have a good selection of interior shots.

Train Sims
www.trainsim.org.uk - the place to go for MSTS downloads and advice
Stoke Division 1969 - Simon Barnes superb reconstruction of an era and area fondly remembered.
www.auran.com/TRS2006 and www.auran.com/TRS2004/DLS.php contain details of Trainz downloads.

For Sale / Wanted and Suppliers - Spare parts
Bluebell Railway technical pages
The Carriage Exchange
Robert Forsythe In addition to a strong interest in model railway history, Robert is passionate about railway publicity and in particular that involving DMUs. He is interested in obtaining gaps to fill his Paytrain collection and earlier material. There is always spare material available for other railcar publicity collectors.
Traction Ads

Photographs
IT'S A TRAIN THING! is a large and continually growing collection of photographs taken over the last 22 years.  It features Diesel, Steam and Electric subjects with a good selection of first generation DMU's.
ttp://www.heritage-now.co.uk/gallery/thumbnails.php?album=62 has Railcar50 pics
Colin Brooks's fotopic site has this mixed gallery and some other class specific ones

Modelling
Anbrico A historical look at the firm that made hand finished DMU models
British 1:87 Scale Society Details of an HO gauge Class 101 that they sell
DC Kits make and sell a variety of plastic DMU kits, amongst other stuff
The Historical Model Railway Society
http://www.cvmrd.freeserve.co.uk The Unofficial Churnet Valley Model Railway Department!
Westford Modellers Group

Preservation
UK Heritage Railways - All the UK's preserved railway sites can be found here, plus much more.
Chinnor and Princes Risborough Railway - operate bubble car 55023.
Chasewater Railway - operate a class 117.
www.ckp-railways.co.uk - the Keswick- Penrith re-instatement project
www.eorailway.co.uk - Epping Ongar Railway Volunteers Society
www.swanseavalerailway.co.uk Swansea Vale Railway
www.preservedrailwaystocklist.org.uk - a comprehensive list off all preserved vehicles

Railway - General
www.bufferbooks.com - an out of print/secondhand railway book enterprise which from time to time has DMU related items in stock.
crewenorthjunction - Crewe North Junction Supporters group
www.graf.tv GRAF Association (Railways Enthusiast Roman Group) web site
Irish Traction Group
Link-Rail Links to almost every other Railway site
Parry People Movers Ltd
The Rail Enthusiast Web Site contains: Photolog; Depot Directory - (claimed to be the most comprehensive on the internet); Rail Mailing Lists - details of most UK mailing lists; Locomotive Diagrams - class 37, 47, 86, 87 and 90 passenger diagrams with Virgin Trains and North Western Trains; Downloads - of the diagrams; and Links.
railUK A site dedicated to links to other UK railway sites
RailServe: The Internet Railroad Directory - Over 2,000 rail-related links, search engine, forums, railfan chat rooms, and more.
www.uicstock.org.uk A continental railway site
www.transportdiversions.com - selling specialist transport publications
www.graf.tv - GRAF Association (Railways Enthusiast Roman Group)