The two-seat Venom night fighter first flew in 1950 and was supplied to the Royal Air Force as an interim type from 1953, but the Venom NF.2 and NF.2A had various issues and were replaced by the NF.3 mark in 1955, only a year before the Gloster Javelin entered service. Sweden ordered sixty NF.51s, similar to the NF.2 and NF.2A, with deliveries starting as early as December 1952 - complete with flying restrictions. They were replaced by the J32B Lansen by 1960.