Worked for Huntings at Barkston Heath 15 years ago and we had just that.
The SATCO was disgruntled that the qfi's both civil and mil were saluted by the RAF police at the gate ( as they were in growbags they never knew from a distance who was mil and who wasn't an officer!)
as a result we had a uniform of Navy blue trousers, Navy jumper,Navy tie, black shoes and a white shirt with civil aircrew style rank tabs.
a captains 4 for the SATCO, who ironically still didnt get a morning salute as there was no mistaking who he was,
3 for his deputy, 2 for humble controllers, and a mere 1 for yours truley as an atca.
one of the snags with the "uniform" was the number of times i was asked for product advice at the Grantham branch of Safeways whilst doing the Butty run!