SWA in coffee shop

I suggest galvanized P-clips every couple of feet.

Is this overhead, or on a  wall, screws in a wall angled slightly down are far less likely to come out, even with plastic wall-plugs softening, than ones that screw upward. In terms of how many, imagine how far it would drop if you removed one, then two. When you reach the point where it droops to near head height you no longer have enough so put a few back...

Mike 

I thought there might have been something in Guidance Note 1 Selection and Erection, but I can’t see anything, relating to support for cables as per 521.10.202. As an aside, I note the bods have been at their work in the electronic versions of the IET suite of books. Really don’t like the change. I much prefer the electronic copy mirroring the written book. 

My thoughts exactly! If you leave out a clip and it does not droop, the clip may not have been necessary. However, I shall stick by my couple of feet - if it looks neat and tidy, it is neat and tidy.

There is a world of difference between cables along a wall and cables across a ceiling or doorway. The latter are much more likely to entrap an escapee or fire-fighter.

On a different matter, in the same installation. The building(incorporating the coffee shop on the ground floor and short term let apartments above, with a common entrance), which is a listed building, has been recently refurbished, including re-wired. It looks like they have used LSNH cables for most circuits that I can see. Would this normally be a requirement in such an installation?

Maybe not always a rigid legal requirement, but commonly a contractual spec from more switched on designers. PVC, which is the usual alternative to LS0H, is pretty horrible in a fire, releasing hydrochloric-acid gas and black smoke. Certainly LS0H is what you would expect to see in larger buildings to facilitate evacuation and minimize smoke inhalation casualties. Certainly mandated in underground stations, schools and hospitals, and a very good idea in other places where a fire evacuation might not be instantaneous.   Of course much of that good work is defeated if the expensive LS0H cables are then routed inside PVC trunking, but a few trunking manufacturers are catching up with Poly carbonate and similar offerings for those who don't want steel on show..
Mike