Not sure how helpful this is... I made a list of the men remembered at Runymede and extracted the names of the ones who died on 9/6/1942 and were in 405 squadron.
PLATT, WILLIAM LLOYD Warrant Officer Class II R/69669 09/06/1942 23 Royal Canadian Air Force Canadian Panel 102. RUNNYMEDE MEMORIAL
MORRIS, DAVID GORDON Pilot Officer J/15342 09/06/1942 24 Royal Canadian Air Force Canadian Panel 101. RUNNYMEDE MEMORIAL
FLEMING, JOSEPH Flight Sergeant 936192 09/06/1942 22 Royal Air Force Volunteer Reserve United Kingdom Panel 74. RUNNYMEDE MEMORIAL
CATTLE, THOMAS ROBERT MANARD Flight Sergeant R/53364 09/06/1942 Royal Canadian Air Force Canadian Panel 103. RUNNYMEDE MEMORIAL
HOLLAND, REGINALD DOUGLAS Sergeant 1167380 09/06/1942 21 Royal Air Force Volunteer Reserve United Kingdom Panel 86. RUNNYMEDE
JACKMAN, ERIC LESLIE Sergeant 1180364 09/06/1942 Royal Air Force Volunteer Reserve United Kingdom Panel 86. RUNNYMEDE MEMORIAL
MONTGOMERY, GEORGE RAYMOND Flight Sergeant R/69146 09/06/1942 21 Royal Canadian Air Force Canadian Panel 105. RUNNYMEDE MEMORIAL
Here is a good link for the history of the 405, if you click on the heading "No 405, the first bomber squadron" it will take you to a detailed history in a .pdf. You might be able to work out where he was based.
http://www.manitobamilitaryaviationmuse ... light.html And this one
http://www.raf.mod.uk/history/bombercom ... 031may.cfm It is all very interesting stuff! Since it was a Canadian squadron (with British men on board) then perhaps there will be more info on Canadian sites? I don't know if the men above would all have been on the same operation - you could find out about that I expect.
(Way out of my comfort zone with this now, you would do well to ask about it in the appropriate section)