Marvo
If you are asked to fly a specfic speed due tfc ahead, why do you fly a speed that is 30kts faster than the speed requested
People, Marvo gave you the reason in his post....
My colleague on the flight deck selected the speed but left the aircraft in vertical speed mode (V/S)
He selected the incorrect mode, not deliberately... and the mode selected does not, necessarily, control the speed. Vertical Speed mode is a strange beast. It has it uses, and it also has its pitfalls.
Totally unfair on Marvo