Modern well wagons

[nightstar.train]

I'm looking for information on 'modern' well wagons. Are there any still in use? I know there are the few (4?) massive 8-axle ones DRS have for moving nuclear flasks from the docks to Sellafield. Any others? Am i right that EWS had some fairly modern ones? And are they still in traffic? And then are there any kits of them in 4mm? The only models i can think of are the Bachmann ones, but they are all steam-era, and not really suitable for what i want. 

Thanks

[Fat Controller]

EWS own some FAA container wagons, which resemble the old style of well wagon:-

http://ukrailwaypics.smugmug.com/UKRailRollingstock/F/FAA-EWS-Well-container/16976902_QPxxPb#!i=1370987243&k=bkSZRbx

AS far as I'm aware, these are only used for container traffic.

The MoD operate some 'Warwells', built during the early 1940s, then rebuilt with new bogies, and air brakes, in the 1970s:-

http://ukrailwaypics.smugmug.com/UKRailRollingstock/K-Tops-codes/KWA-Warwell-vehicle-carrier/17909258_vBS7fN#!i=1769171372&k=28H5nNP

Finally, there are some new-build wagons built as plant and machinery carriers to replace the older Lowmac, Flatrols and Weltrols:-

http://ukrailwaypics.smugmug.com/UKRailRollingstock/K-Tops-codes/KWA-engineers-plant-carriers/17909275_GvvRcN#!i=1370738745&k=rs6pp9N

I can't think of any others at present.