SID Climb
Ok....
Here's a hyperthetical one for you then....
Flying an SID from a UK airport.
You change from tower to departure control.
Flying the SID, there is a block altitude of (say) 5000'
The controller is very busy, and when you check in, no other clearance is given to you.
You arrive at the waypoint that has the block of 5000' and then next waypoint is 12 miles away, which must be at 6000'.
Must you, and when do you start climb to that new altitude?
I stress, you are in ATC contact, and have been identified...but due to workload of the controller, you are rapidly approaching a waypoint at an altitude other than that published for the SID.
Not sure if I've explained myself too well...
Any advice?