viable
restricted
I must say that I was surprised by the choice of the Q1, even in their heyday many areas of the SR didn't see them.
I know it was a different time and all that but IIRC the original Tri-ang Hornby M7 was one of their best sellers!
You are allowing your locality to cloud your judgment I suspect, I can remember (not so many years ago) when people were poo-pooing the idea that ex LNER loco's would sell in commercial quantities...