Am 89.999+% sure that the HU5s that were loaned - along with their senior maintainers - to 2 FTS in 1977 had the traffic lights atop the coaming. Unfortunately I only took to photography in 1978 so have no visual evidence. Annoying as they were, they didn't take up anywhere near as much space as the DECCA nav in the HC2s.. for short-@rses like me, most trips involved much more IF than they should've.
Now, for Sports Afternoon try the AAC - especially after the Wednesday Curry Lunch in the Middle Wallop OM (ISTR the only time flying suits were permitted to be worn in the Mess). The only Wessex connection here, though, was the nose-door that followed a certain officer around wherever he was posted, including his tour(s) as DCI at the School of Army Aviation.