I became aware of this a couple of days ago so went over on the offchance. One interesting thing, though. He didn't seem to use the published go-around procedure for LCY. Assume this was a requirement due to it being a test flight? I suppose that pushed the aircraft out over populated areas it wouldn't normally overfly - plus TOGA would have been used for the touch and goes, I guess. Those things would conspire to make the flights a bit more noisy than normal. The real take-off (at about 11.30 local) seemed to me to be no more noisy than the 146s or the Avros. It also looked like he used reversers to bring down the speed on touchdown - something not really seen too often at LCY! Overall, looked impressive!
