The Churchill Ark was an expendable bridging tank produced by fitting folding ramps at both ends of a turretless Churchill tank. The disastrous Dieppe raid in 1942 made it clear that sea walls could be very effective defensive fortifications, preventing the attacking troops from leaving a beach. The 79th Armoured Division (Major-General Hobart) designed the Ark (Armoured Ramp Carrier) to solve that problem. The Ark Mk I took part in the D-Day landings.
The Ark was expected to be expendable, at least in the short term. Once it had been driven into place it would be left in place until either no longer needed or a more permanent bridge or ramp could be built. Two Arks could be combined to fill deeper bridges, with one tank on top of the other, while a row of Arks could provide a temporary bridge across shallow rivers and streams, and was used later for crossing anti tank ditches, especially during the assault on the West Wall.
(Each model comes unpainted and may require some assembly)