Fastest British non Streamlined steam locomotive?

Question

None of you got it right last time when I asked a similar question with the same answer.........

Answer 1

Assuming you're not happy with the flying Scotsman?

How about the Gresley Pacific?

http://www.gresley.org.uk/mainpage.htm

Answer 2

Flying Scotsman,or streamlined was The Mallard.

Answer 3

City of Truro?

But if you know the answer - why are you asking us?

Answer 4

Flying Scotsman on the Peterbourgh straights

Answer 5

Didn't a LMS Coronation hit well over the ton in the 30's just south of Crewe (can't remember the name or number, sorry).

Just a guess.