Suggs
How long is a piece of string??
How high depends on what is holding at BIG at the time.
You NEED to be FL130 by the time you cross the EGLL centreline.... theres a nice gap at that level in the Lambourne stack if the next sector can't give you higher.
Depending how you climb will determine when you get turned... If you are just on a jaunt to EGPH or similar, you will climb well and therefore if not holding high at BIG, you should get a fairly early turn.
If you are off to the States and are heavy, on a hot day, with BIG holding up to FL150, we will get higher from the next sector and climb you to that..... the problem then is turning you tight enough or getting you high enough to miss traffic coming to Lambourne from the east.
If there is nothing at OCK and you are climbing well, you may even be given vectors to the NNW initially to keep you away from BIG traffic.
Most controllers will keep your speed restriction on for the LAM departure from lgw, this helps us and you.
The reason this thread started was that myself and colleagues at TC are unhappy that using speed as a tool is going to be taken away from us. It does not affect the LAM departure as it is a handover from one TC controller to another; it is AC that want us to trial the 'keep everything slow'