Corgi Steam Rally Collection Britannia WM Thurston & Sons Super Speed Cars The Corgi Steam Rally Collection is a range of detailed die cast Road locomotives, representing some of the greatest Showmans Engines that parade across the Steam Rally scene. Burrell Works Engine No 2668 was built in 1904 & supplied new to W & H Thurston of Cambridge. Later in 1920 Thurstons purchased a Gondola Switchback Ride & a Dodgem Track, Britannia was used to haul & power the dodgems.