Originally Posted by
RandomPerson8008
The main point of question for me is: what altitude after reaching CLN at 6000?
Ask ATC? You'll likely be on vectors long before reaching CLN anyway.
Originally Posted by
RandomPerson8008
For all practical purposes the departure radar controller issues higher level before it becomes an issue (in this case, frustratingly they did not use the "climb now" phraseology, rather simply "climb level 200"); perhaps im just being pedantic.
If you were still on departure route (i.e. not on radar heading), you should challenge the ATC whether climb clearance is actually "climb" or "climb now". Climb in UK only allows you to follow the SID climb profile, whereas "climb now" allows for unrestricted climb to cleared level.