Simon Glancey has submitted the following:
Sgt. Shuttleworth was killed when Vickers Wellington 1c P6243 of 99 Sqn was lost on a mission to Wilhelmshaven. The Wellington was lost without trace, along with the six crew members.
Royal Air Force Bomber Command Losses of the Second World War: 1939-1940; W.R. Chorley; 1992; Midland Counties Publications; ISBN 0 904597 85 7, page 118
Tony Hibberd has provided the following:
Wellington P9243 LN-? had departed Newmarket Heath at 1900 for Ops Wilhelmshaven
It was engaged by Marine Flak Abt 232 Batterie Sande, hit and shot down
The aircraft crashed into the North Sea near Borkum at 2300Nachtjagd Combat Archive The Early Years Part 1 Dr Theo Boiten
Bernard Shuttleworth is remembered in Bishop Auckland on B140.12