Yes, but it was before the Question was tabled. The hon. Gentleman's letter raises three rather substantial points. The first relates to sonic booms which, he believes, are knocking down his greenhouse. It is important if one has a greenhouse that it should not be knocked down by a sonic boom. Secondly, he raised the subject of flights from RAF Coltishall. Thirdly, he raised the matter of the fuel crisis. All these matters are important and they needed investigation by three different sections of the Ministry of Defence. I have such respect for the hon. Gentleman that I was determined not to get the matter wrong, so it took a little time. On the question of sonic booms in particular, because of the large number of aircraft in our air space it takes a long time to find out which boom is sonic on a particular day.