No Speed?
I would like to ask a question to any London controler handling departures at LHR. More often than not we are told 'No Speed' - what exactly do you expect from us following that clearance. I understand it to mean that once above 6000ft we cleared to increase speed above 250kts, in order to comply with noise routes. However many collegues seem to prefer to increase speed immediately regardless of present altitude or position in the departure.
I'd appreciate your professional advice.