 A further three DH-100 Mk.6 (J-1080 to J-1082) were subsequently built from remaining spare parts.A force of 39 DH-115 Mk 55 Vampire two-seat trainers (U-1201 to U-1239) were also in service from 1953 to 1990.Examples survive in 28 countries, with airworthy examples in ten.