Wise ones. I shall try to avoid causing the offence I have elsewhere through excess verbiage :-(.
Oops. Blew that one already :-).
Thanks indeed to pbarnett and WillHall, I've been able to stumble (stumbling being my own lack of competance rather than any issue with Rules) to this:
When [new comment added]
_____Where [comment author is not] [list of roles]
Then
_____[create email to] [list of specific email addresses]
__________Containing [date stamp when comment added] [user name of comment author] and [comment body]
For the condition, is it possible in Rules to replace [list of roles] with [list of users]? I can't see a way so far, but that might just be me still being dumb :-(.
I could, of course, get round it by adding some non-standard roles to specific users, but that feels like a kludge. In essence, I'm trying to avoid getting notifications for things I posted myself.