P -N - Mason came to me after a bit of head scratching (if you'd said Pablo it would have been easier), but Green, Grace and the Major escaped me until prompted.
The speed record that Twiss held (in the Fairey Delta 2) was 1132 mph, one of those figures which refuses to leave my brain to make room for more useful bits of information, like my mobile telephone number!
(btw - How long since a policeman stopped a motorist for speeding and asked him "What's your name sir, Fangio"?