I meant North Star ones. As far as I'm aware regular British cavalry made do with Martini carbines until about 1896ish and then swapped over to Enfield carbines, and then during the 2nd Anglo-Boer War adopted full Lee-Enfield rifles. The North Star dismounted cavalry look like they have full length Martini-Henry rifles - it is perfectly possible that they adopted them for this campaign if there was lot of dismounted action.