Simplex locos in various scales, kit and scratchbuilt.

A 20/28hp in 7/8ths scale by Carlo Spirito.
A 60s diesel on 'saddleback' gravel wagons on 'Whitaker's Tramway' 7mm scale by Dave Hall.
A 48/63hp diesel in 7mm scale by Dave Hall.
A 7mm scale Wrightlines kit of an 40hp 'open' WW1 loco at the workshops of Whitaker's Tramway. for more pictures of Whitaker's Tramway see the Rustons R Us pages.
A Wrightlines kit of the '20hp' (actually a model of a 20/26hp petrol loco that has been converted to 20/28hp diesel) by Eric Fresne.
The Wrightlines 40hp 'protected' type kit as built by Eric Fresne.