but there once was a low-weight take-off from Cardiff straight out to sea, without any restrictions, that IIRC still holds the record for the shortest time to Mach 1 and Mach 2 from brake release....
The route from Bahrain to London was quite good to, as once the throttles were opened for Take-off they were never touched again until the decel in the north of the Adriatic. The departure went if I remember correctly like
Throttles opened for take -0ff
At 500 ft switch off reheats
At 1000ft select Climb Rating with the switches on the overhead panel
At M0.95 select reheats in pairs
At M1.7 switch off reheats
At 50,000ft select Cruise Rating on the switches on the overhead panel
Sit back and have lunch before decel
The aircraft would be heavy and the ground temps high so the climb accel would be slower than out of Cardiff,but it was still impressive.