RAF Squadron No. 61
Group From 24/7/1917 To 31/3/1958
It was first formed in Rochford, Essex as a fighter squadron of the British Royal Flying Corps during the First World War and disbanded in 1919. It was reformed in 1937 as a bomber squadron of the Royal Air Force and served in the Second World War and after until it was finally disbanded. Its motto 'Per Purum Tonantes' means 'thundering through the clear air'.