I can hardly make out the reg even with your suggestion
Certainly looks close enough to a Cadet to me and Dave Reid's id ability out strips me by miles!
'Ere! Quite by coincidence, as I type this music on my laptop is on shuffle playing Supertramp's Child of Vision, used with superb effect on the Rothman's video of David Perrin's solo display at Biggin in 1981 or so... nearly took my bloody head off with his inverted departure from 21 that year ! Where would he have been today?