Gieves did indeed have a shop. It was in Strait Street in Valletta.
My first SD Hat in 1961 was from Alkit, my No 1 and No 2 from Moss Bros and No 5 from City. The attraction of the No 5 from City was the special lapel facing which I was told was wipe clean and indeed in its 49 year life it never needed cleaning.
The other item was the Crombie Great Coat and I think that was Moss Bros too.
None of our kit was provided from stores apart from Hairy Blues, beret (but not badge), shirts and collars, and airman pattern shoes.
As there was a fair chop rate we did not get the money to buy a second No 1, No 5, or Great Coat until we finished flying training.
My 2nd No 1 was second hand from a pilot when the first was 14 years old. It lasted for the next 25 years as it was worn infrequently, and finally replaced 2nd hand for the last 10 years. It wax a Burton's model.