Thanks for everyone's reply, to people/person saying it should be rethought about, it's an office space very very small 40sqm at most! Computers, small kitchen etc. So yes a domestic board was fine it's just that they've decided to put a piece of machinery in after the whole installation that I have no clue about and just been asked by the builder that it needs to be type D 16a with a commando socket. It's very unusual industrial equipment would be put in an office which is why you wouldn't put a industrial board on. But everyone else has been very helpful. I'm still scratching my head through this one. I'm actually going to try a RCBO C CURVE 20A, and see how we get on if needs be then I think I'll go down the route of another board