Tony Bowden was kind enough to contact me about the bomb aimer on ED559 - Charles Stuart Challoner. Tony researches members of Manchester's police force who joined up for both the First and Second World War. He mentions that a very high proportion entered into the RAF during WW2.
He sent the below picture of the memorial board. He's checking into the archives that remain to see if a picture Charles Challoner can be found. Fingers crossed.
As and when information is found I'll post to this blog.