(6) Britian - West Africa/Takoradi. A lot of a/c were flown to Egypt this way, rather than floating them round South Africa. I suppose small quantities of urgent supplies and VIPs went that way also.
Possibly the biggest understatement ever ... you should replace "a lot" with "bloody thousands!"
As for the security of the allied supply route, the Red Sea was classified as a "combat zone" by the United States and there ships would not enter those waters until the Italian navy in East AFrica had been suitably shot up and the East Africa Campaign made some good progress. The term was then dropped and yankie ships kept flowing in.
So, Allies supply routes are;
(1)Britain-the Mediterranean- Alexandria port
(2)Britain- East Africa- land route
(3)Britain- Cape of Good Hope- Suez canal(or Suez port)- Alexandria port
(4)Britain(or India)- Persian Gulf -Al Kuwayt
(5)Red Sea- Aqba port.
Is that Right?
I think Playfair has a nice dotted map somewhere in his book showing the length and general routes used, ill try and find a copy latter (like 12+ hours time ) when am home.
One should note that a proportion of the allied forces supplies came from Egypt itself, factories etc were set up to deal with spare parts etc, dont have the full details on them though.