On 23 September 1940 he shared in the destruction of a He 111, which was undertaking weather reconnaissance over the Atlantic.
Posted away from 236 in July 1941, Inniss joined No 248 Squadron in 1942. On 29 November that year he probably destroyed a Ju 88, on 29 January he shared a Ju 88 and on 10 March he shared another. Awarded the DFC in July 1943, he later commanded the squadron, as a Wing Commander.
Inniss retired from the RAF on 18th December 1957 as a Squadron Leader, retaining the rank of Wing Commander. He and his wife ran a north Devon pub for a time. Wing Commander Inniss died on 30 January 2003 in Bridgetown, Barbados, and is buried in the Military Cemetery at the Garrison, Needham Point. In 2008 he was depicted on a Barbados stamp.
