Air Review, the official publication from the Air League of the British Empire, began its run in 1934, Vol 1-No1, under the blue/grey cover as seen earlier, this ran up to July 37, Vol 4 - No7, where my collection breaks until January 38, Vol 5 - No1, shown below. 

I have established that the "old look" was replaced by these "new look" with the September 37 issue, and there was no publication for August 37, it therefore appears that I have a nine month gap in my collection.

Oh well, I'll keep looking with my fingers crossed.

July		August		September
October		November		December