KelvinD
we had to endure 20 hours from Aden to Lyneham!
When I was on 99 Sqn Britannias we did Khormaksar - El Adem in around 6hrs 30mins and El Adem - Lyneham in around 5hrs 30mins, so not sure which route you flew if it took 20hrs.
Britannia in CASEVAC role