British Commonwealth, but what force

These are obviously pictures taken from a newsreel of a visit by Elizabeth II to a middle eastern territory of the Commonwealth (1950s?). The mounted policeman belongs to which Force? Palestine 1940s?

Yemen? Oman?

The man standing next to HM in the first photo is wearing the uniform of a British colonial governor. The governors of the 14 remaining British Overseas Territories still have a prescribed uniform although the FCO discourages the use in order to present a more "modern" image of the territories and their links with the UK. In fact I believe Bermuda is the only one where governors still wear the uniform on ceremonial occasions.

This is Libyan police

Last picture - 3rd or 4th from left, in back - van Dyke pattern on cap. Scots Greys?

Yes, ADC to the Royals.
Libyan police surprises me but on reflection I can see it from the badge. Kind of thought it was Palestine but it didn't quite fit. Thanks Michael.