WS 88 maybe one of the first UK Walkie/Talkies. Used a load of B7G valves.
A VHF band I channelised radio in an ammunition pouch and battery pack in 2nd pouch is post WWII though.
They made two covert receivers in UK for dropping behind the lines, a Polish designed superhet and the Norwegian designed 3 x 1T4 TRF/Regen, the Sweetheart that used the RCA B7G tubes.
I think problem was that all B7G would have had to be imported till about 1946 / 1947. Eventually by 1942 they were importing Sylvania and RCA Octal tubes and for battery tube use the Mazda octal and Edge connect production seems to have been gone by 1943. Apart from EF50, I think virtually all valve production was Octal in UK by 1943. I can't actually think of ANY UK made battery valve Military model during WWII, they used rotary converters (dynamotors) and vibrator packs with mains valves. There may have been SOMETHING that went on a backpack made by UK for Military during WWII, But I can't remember reading or seeing such a thing.
Of course in the 1950s to save space even mains military equipment used a lot of mains type B7G, not often seen in UK domestic models, but used in USA sets. My nearby radio friend has box loads of CVxxx and CVxxxx B7G types, mostly mains. Some are battery type and interestingly some are only US equivalents, not DF91 / DAF91 / DL92 / DL94 types. (1T4 / 1S5 / 3S4)