Ordered straight from the drawing board this aircraft had been overtaken by fighter development by the outbreak of the Second World War. The Blenheim was used extensively by the RAF as both a light bomber and fighter before being phased out of service in 1943, replaced by more modern types less vulnerable to enOrdered straight from the drawing board this aircraft had been overtaken by fighter development by the outbreak of the Second World War. The Blenheim was used extensively by the RAF as both a light bomber and fighter before being phased out of service in 1943, replaced by more modern types less vulnerable to enemy fighters.emy fighters.