FV215 - Project for heavy self-propelled gun (SPG), known as "Tank, Heavy No. 2, 183mm Gun", based on modified Conqueror tank (FV214) chassis (rear-mounted turret & engine moved to center of the vehichle) with L4 183 mm gun. Project cancelled in 1957.
FV215B (fictional) - designed by online game World of Tank (WoT) by Wargaming (WG). Based of FV215 chassis + Conqueror tank (FV214) turret & 120mm gun.