Cardinal
Thanks for the reply. Any more views out there on this?
The reason for asking on this bulletin is that 'the trial' to be conducted seems to me to be much on the lines of FAR91.117: 250kt below 100 rigidly enforced with no controller discretion to cancel. There is a bit of an irony here in that if a heavy is not allowed to accelerate to min clean, he may be flying at a speed a lot less than 250: a 763 Flap 1 placard speed is 250kt, so if I'm wizzing around with flap out, don't expect me to be doing more than 240.
Don't know the position with other types, but presume the bigger Boeings & Airbuses are similarly affected.