I seem to recall that a somewhat older "David Niven" had an interesting role with "Special Forces" during WW2
If memory serves, he was a member of The General Headquarters Liaison Regiment AKA Phantom whose role was something along the lines of a forward deployed EW unit designed to work out where the enemy FLOT was so a bomb line could be put down.
A bit of a turn up really considering his earlier military career when he "escaped" to the States whilst under arrest for insubordination and resigned his commission by telegram - no JPA to deal with in those days