I'm aware that all consumer units from 1st July 2015 should have non-combustible enclosures, with an impression this really means either an all steel CU or a combustible one in a further steel cabinet.
Screwfix and Toolsatan seem to quote having metal DIN rails but that's about it.
Are there any CUs conforming to the Subject line, or are they like hen's teeth or worse have a gold plated price-tag?