http://www.bbc.co.uk/history/ww2peop...a7286006.shtml
"On 4th August Pilot Officer Timewell crashed 11 miles to the SE of the base, and the search was conducted by Sqn. Ldr. Gillam and Flight Lt. Hugo."
MILITARY AIRCRAFT CRASH SITES IN NORTH-WEST WALES
Hurricane MkII Z2404,
The aircraft was assigned to 238/401/402/615 Squadron,
Caught fire and crashed 1.5 miles SE of Newborough.
According to René Mouchotte
27 july 1941 entry : the squadron was suffering from an epidemic of engine fires caused by glycol "sabotaged" with acid.
6 august entry : back at Valley to learn of Timewell death, engine problem, a/c on fire, baled out too low.