When my dad left the UK in November 1941, I believe the division that he sailed with was planned to be going to Basra, but en route. Plans changed. Most of them were diverted to Singapore. Luckily for my dad, he got off at Bombay, and ended up in Alexandria.
RASC and supplies was an essential part of the Army. It always has been, and always will be.
One of the reasons for our success in North Africa, was that we built up our supplies and reserves,
While at the same time attacking Rommels supply lines to the point when his tanks ran out of fuel.