I ended up buying a Wylex NH series. Cheap, big (15 ways), fairly well made. Comes with a 100A switch and two 83A 30mA RCDs for split- loading per 17th Ed.
Cost another 30 quid to fit a double-pole 100mA RCD instead of the supplied main switch (They offered 16th Ed RCD incomers, but not yet a
17th Ed triple-split for TT use). The two workshop feeds need to avoid the 30mA RCDs, and as it's a TT (overhead) supply I can't simply run them from the main switch, no matter what their cable (inside the workshops are their own CUs). No RCBOs planned as yet.I'm plannning to run the kitchen cooker / oven circuit from the 100mA side too. I can protect the cable so as to not need a 30mA RCD from that aspect.
One thing I'm not certain about is discrimination between the incomer RCD and the 30mAs, in terms of their times (When it's wired up though I can time them, with my new Shiny 8-) ) I've been "assured" that it's OK, but...
So, does this fly?