I was at Booker today - every aircraft was landed by 1058 with the engines off, starting again about 1105.
Quiet, solemn, and appropriate. I was impressed.
Re: the Helicopter. Sadly no particular reason he could have known you were doing that, and it wasn't on the 2 minutes silence either. Sorry to say it, but I can't help regard it as just bad luck. And from 3,000ft the noise should have been pretty minimal.
G