Hi chevron,
Down our way it's the Senior Service, who may do things differently from their colleagues in pale blue.
Fortunately, they bandbox UHF and VHF controller transmissions, so we can guess when they're talking on UHF i.e. they say something and there's a deafening silence as far as we're concerned, then there's a further transmission. Usually, you can fill in the gaps yourself.
I used to hear 'stud' when getting a 'service' from Benson, so I guess it's a difference between the Services. Occasionally, they'll read out the full UHF frequency, mostly to visiting aircraft flying down from England.
TOO