Danny,
my mother in law died two years ago (aged 105 !) and only now are we sorting through the paperwork. We came across the above which may bring back memories for you. It is one side of a an airmail letter. If you are interested then I will put up the other side.
There was also a picture of a sergeant pilot in the lot. My wife seems to recall that he was a cousin and drowned whilst on leave shortly after getting his wings.