Yeah they do.
Well, some of them anyway. The posh ones all use marketing companies e.g. Quidos (who I work for) Niche, BPM, or Ehouse as they will provide proper CAD represented floorplans and print and design the brochures as well if they require it. Our company also offers training facilities for those who don't wish to use our services.
Agents we work for include.... Strakers, Staggs, Dreweatte Neate, Savills, Knight Frank, Hamptons, Humberts, Cooper & Tanner, Davies & Way, Cobb Farr, Andrews to name but a few.
Some of these are local and some are international companies. We do all sorts of properties from 200k boxes up to multimillion estates.
I think a lot of the high turn-over agents like fox's and halifax still use the agents to take their photo's.
Why do you ask?
If you're interested in doing this sort of stuff the best thing to do is to approach a local agents and see if they'll let you do one or two as a (free?) trial and then work from there. Ask them why they don't use a proper 'tog, it'll probably be down to budgetary reasons I would imagine.
Should only be an hour or so's work for a standard sized property. For a fancy mansion it'll be all day more than likely.