Bono Vox,
Leaving the original cruise level is not the problem.
It is when you are at FL180 flying over London (as directed by ATC) and you get given a left base for 26 at LTN.
I have never been to EGAA but I bet it is a bit different to going into London TMA airports.
LGW & LHR arn't nearly as much of a problem as you are far more "controlled".
As for the rest of your comments, well they are not very mature so I won't bother commenting!