Royal Marines Light Infantry did not wear collar badges on their scarlet uniform (rig) and instead wore an embroidered badge (in their case globe and laurels) on the shoulder strap, just like the Guards did (and still do) too. They did, however, wear a red embroidered bugle on the collar of their blue undress frocks (loose fitting jacket) for a period.
The soldier shown is from an army Light Infantry regiment, as suggested, but the photo’s not clear enough to know which as the shoulder title is indecipherable. Knowing where he came from might offer a clue, although in those days men tended to join a regiment temporarily garrisoned nearby and these could be any regiment. However, dark facings pre-1881 would suggest the 13th, 51st, 68th, or 85th. Going by the pattern of tunic I’d date the photo to the very late 1870s.
