OK, maybe I'll have to give Hager another try.

Square D doesn't seem to be very common around this area. Few local suppliers stock the range, and it's quite rare that I see any Sq. D stuff installed.

Past electricians in this area seem to have been big supporters of MEM switchgear. If I go into any house or small shop which has obviously not been rewired in the last 20 years or so, I'd say there's about a 90% chance it will be MEM equipment, with Wylex Standard Range a not-very-close second.

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However I replaced the RCBO, as I did not trust it's safety after smelling burning & seeing smoke.
Good call. It's hard to trust any component after that.