The rank insignia is a pip over a crossed sword and baton.
Royal Air Force usage
From the foundation of the Royal Air Force on 1 April 1918 to 31 July 1919, the RAF maintained a rank of major general. The rank insignia was derived from that of a Royal Navy rear-admiral and featured a broad gold stripe on the cuff below one narrow gold stripe. The two stripes were surmounted by an eagle (volant and affronty) under a king's crown. The RAF replaced its rank of major general with the rank of air vice-marshal on the 1 August 1919. The following officers held the rank of major general in the RAF: