The Air Ministry's replacement for the Blenheim as a daylight bomber, another Bristol design, the Buckingham, was overtaken by events and changes in requirements, and considered inferior to the de Havilland Mosquito, and as such did not see combat. The final ground-attack version – the Blenheim Mk V – first equipped 139 Squadron in June 1942. Eventually thirteen squadrons – mainly in the Middle East and Far East – received this variant but operated them generally only for a few months.