Despite being dressed in the uniform of the Irish guards (tunic buttons grouped in fours) the Hendrix-like guard has no plume in his bearskin (should be blue, right side) and the dress belt is not current regimental issue (although it may be a correct older-issue piece – difficult to tell).
Standard issue weapons for the Irish Guards are the SA80 A2 assault rifle and the Minimi Light Machine Gun.
More to the point – has that model (the one without the weaponry) graced some of your own photographs previously? There is nothing 'wrong' with her picture (meant only in a complimentary sense, of course!).
Cheers,
pplater.