HI,
I could not dispute what Old Rowley has already told you,but would ask the question why he thinks the photos are after 1922?
In the top Photo the soldiers are wearing the badges of The Royal Artillery both are also wearing Spurs on their Boots and suggest were part of the Mounted part of R.A..This could have been pulling Gun Carriages ,Supplies ,Ammunition ,or Even Water Tenders ,all Horse Drawn.
The reason i say this is that my first wife's Grandfather was in R.A. he valued his Spurs and rode a team of horses delivering Water from a Tanker from one gun emplacement to another, I believe on the Somme,certainly in France.
Does Old Rowley know when horse drawn vehicles were last used by the armed forces ,I am afraid i don't
Best Wishes and Good Hunting