==Further work definitely needed== 
 There is something "off" about this article. It needs some real in-depth research. Above the Trenches and theaerodrome are at odds with one another. 

 First of all, out of the hundreds of bios I have done on WWI aces, this is the only one where a Royal Naval Air Service pilot transferred into the Royal Flying Corps. (RNAS pilots got involuntarily amalgamated into the RAF when it formed, but that's a different story.) The RNAS got paid better than the RFC, so why did Clayson voluntarily take a pay cut? 

 Second, checking the London Gazette shows that Clayson was not forwarded from another unit to the RFC; he is on the General List; i.e., he seems to have enlisted directly into the RFC. 

 Thirdly, when you unravel the gobbledy-gook victory list given, it doesn't total 29 wins. 

 Fourthly, the ATT victory list shows all kinds of shared victories, etc., while theaerodrome doesn't.