Think they were used as comms aircraft, one based at each RN station around the UK. The RAF had them as well. If I remember correctly, The Fighter Collection's "hack" G-BRVE, based at Duxford and formerly owned by David Gilmour, has British military history; have always expected it to appear in service uniform but it remains yellow. Robs Lamplough had a nice one painted as the RAF's DR628.