I'm puzzled by the date of the award of a DFM to this man. The award was announced in the London Gazette in May 1945 - two years after his commissioning and his death.

James Lauder Shiells, Distinguished Flying Medal, Pilot Officer/Pilot (143451) 15 Squadron, Bomber Command, Royal Air Force Volunteer Reserve.
James was commissioned from Flight Sergeant (1052462) in March 1943 and was awarded a DFM as “1052462 James Lauder SHIELLS (later Pilot Officer), R.A.F.V.R., 15 Sqn., with effect from 15th April, 1943 (since deceased)”.

His Stirling bomber had taken off from RAF Mildenhall in Suffolk for a raid on Mannheim but the aircraft crashed at St-Erme-Soutre-et-Ramecourt, north of Reims, on 16 April 1943.
(Source: London Gazette 14/5/1943 p.2203 & 29/5/1945 p.2793 and aircrewremembered.com - as Shields)

Can anyone help, please?

Ken