I don't want to start a new thread for this so I think this one should be OK for my question.
Many years ago I took a VC10 into LHR. Due to my principle passenger I was allowed in before the night ban had finished. We had to hang around for a few hours before we could depart outside the noise limitation period. I judged my start up time to get us to the threshold at the correct time. We got there slightly early. I was cleared to take off 2 mins early. I couldn't delay as I had piles of traffic queued up behind me. I was violated and I believe that we were fined. On start up should I have informed ATC of my take off restriction? I thought that they would know, obviously not.
It was a very short hat on interview when I explained my predicament.