Just like the real thing: Pete Waterman's site which includes The 'Mitchell Design' range of kits.
Gerald Wingrove: Model car maker extraordinaire!
The Historical Model Railway Society
Apollo Southerns : All the tools you need!
severnmillnameplates The ultimate in 7mm name & number plates!
Thomas Mallard A very nice 4mm site featuring exquisite locomotive & rolling stock models
Masterpiece Models Highly detailed Ready to run locomotives made in Korea
ABC Gears high quality, efficient motor/gearboxes