A little late for your time-frame Warmtoast but here's one in May 1959. Hastings Mk II WD 476.
Colerne – Lyneham (Clyffe Pypard) – Luqa – El Adem – Khormaksar – Karachi – Katunayake – Changi – Labuan – Darwin – Edinburgh (Adelaide) and the same way back plus a refuelling stop in Khartoum. 19 calendar days, 118:25 hours day, 3:45 night. Double crewed freighter.
The routes used to change according to who our politicians had p****d off most recently, flight plans would be annotated “Avoiding France”, Avoiding Italy” or “Avoiding Greece”, I remember a Britannia flight plan which bore the annotation “Lyneham – Luqa avoiding Europe”.