MEM 63A, 30mA revs, A63HE

[polo1]

Is that a domestic install? I ask because the symbol on it suggests its not an AC type RCD. I did manage to get an MEM MCB old style at Wilts in Bristol I dont know of you have a branch there in Glasgow?

Yep, it appears to be an A Type, similar to what's already there.
Nope, we don't have Wilts in Scotland.
Eaton do have a backward compatible RCD, but it costs a bloomin' fortune!

 

[polo1]

And a public "thumbs up" to Westward for helping me out!