At the back end of 1964 I undertook three week trip to WRE Salisbury for familiarization and consultations.
The trip was by the MOD charter flight ex Luton airport, flying Monach airlines in a Britannia.
The rout roughly
Luton to Aden, Columbo to Cocos Islands to Perth
Return I think (I did a number of these flights over the years, so they tend to get a bit mixed up) was vis Singapore, Bombay, Kuwait, Luton.