Following the issue of a Staff Requirement for a next - generation tank , Vickers formally submitted its plans for Challenger 2 to the Ministry of Defence ( MoD ) .
Vickers Defence Systems began to develop a successor to Challenger 1 as a private venture in 1986 .
Following the issue of a Staff Requirement for a next - generation tank , Vickers formally submitted Vickers Defence Systems ' plans for Challenger 2 to the Ministry of Defence ( MoD ) .
Vickers Defence Systems began to develop a successor to Challenger 1 as a private venture in 1986 .