Experimental light tank developped to cross wide trenches like conventionnal British Heavy Tanks but with a very less important weight. The strange shape of this tank kept the trench crossing capacities of British models but with a very less important firepower 'cause the sponsons suppression. Crew took place in center armored compartment and the tank was armed with a single machine-gun in turret. The engineers counted also much on empty spaces of the structure to let pass a maximum of projectiles!