Quite - that's why I said it was (just about!) 'a clue'. One of the devices which operated was, indeed, one of those you mention above. However, don't forget that you're looking for more than one (in addition to the active RCD socket).
Indeed so - we have at least three devices operating. As I said, more than one operated as a direct result of the and, as you and EFLI have deduced, in addition the RCD socket operated as a secondary consequence of operation of other device(s).
That would certainly be a nice illogical one which would be very difficult to explain ... but that isn't what happenedNot sure why but - 5A fuse and all three RCDS.
That is indeed very logical and is, in fact, the main reason (other than fun!) I started this thread - because that is an issue I want to discuss once the answer has been revealed (which I guess I'll do soon!) ...so that is another clue, because I am effectively telling you that devices did, indeed, operate both upstream and downstream of the RCD socket.
OK, I reckon that's close enough to get the prize ... It was actually the 32A MCB and the 5A fuse (plus the active RCD socket).Hum.. 5A fuse & B16 RCBO (& active RCD, as given)
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