Red Arrows Lineup 1969?

I’ve tried to ID the signatures based mostly on the checklist of earlier group members on the RAF’s Crimson Arrows group web page. For 1969 that checklist is as follows:
Chief Sqn Ldr R G Hanna, 2 Match Lt P R Evans, 3 Match Lt D A Smith, 4 Match Lt R B Duckett, 5 Match Lt R Perreaux, 6 Match Lt JT Kingsley, 7 Match Lt I CH Dick, 8 Match Lt JD Rust, 9 Sqn Ldr R P Dunn, Supervisor Flt Lt P Waterproof coat, Engineer Fg Off G E White, Adjutant Match Lt R Dench
These positions do not fairly match the signatures by the formation. From high to backside of the formation drawing I could make out:
First row – Euan Perreaux
Second row – ?, Doug Smith
Third row – I Dick, J Kingsley?, ?
Fourth row – J Rust, Peter Evans
Fifth row – Dick Duckett
The lead (third row proper) is unquestionably not Ray Hanna (examples of his signature may be discovered on-line). The primary signature of the second row may presumably be Dunn, but it surely’s onerous to say.
Of the opposite signatures, one is clearly Ivor Broom, who some analysis reveals was Commandant CFS on the time. The one at backside left is perhaps G E White (EngO). I am unable to make out the third, at high left.
So, who’re the unknown signatures? And the place is Ray Hanna’s?