Hi Dora-9 ... good to hear from you again
I'm pretty certain that no RAF Chipmunks were fitted with both Vhf and Uhf radios (they were either Vhf or Uhf equipped) ... with respect to Mil Vhf aerial installation, this was under the starboard wing. See the yellow quarter wave inverted ground plane rod here on WK518. I've seen some Civilian (ex Mill) Chipmunks with Vhf aerials located as you describe, but such installations are non-mil-standard. In fact ... WK518 was one of the first RAF Chipmunks to be fitted with a Bendix 360/380 Channel Vhf radio which replaced the older 'Steam Driven' 10 Channel XTL controlled 1988 sets.
Image Credit : RAF BBMF
I'm also certain that the Chivenor Chipmunk pic wasn't a 1 AEF aircraft as they were exclusively Vhf equipped from Biggin Hill, White Waltham, West Malling days through to their close at Manston in the mid 90's. As an aside WK518 was on the 1 AEF fleet between 1973 and 1983.
I'll post a few of the other pics I mentioned over the weekend
Hi Huntaluvva ...
I think you may have something there ... many thanks
Best ...
Coff.