 Operational Requirement F.155 for a fighter to engage enemy bombers with radar and infra-red guided missiles (the missiles were specified under OR.1131) included a scaled-down Red Dean under the codename Red Hebe.Gloster offered a development of their Javelin with Red Dean.The "thin wing" Gloster Javelin development was cancelled in 1956 and Red Dean went with it, despite a major redesign and abandonment of the requirement for autonomous active homing.