You can find the relevant sitrep entry
here (with St. Eval and Mullion on the following page).
Quick translation:
00.07 to 00.30 Portreath (20 km north west of Falmouth) by 10 bombers from 100 to 4000 m altitude with 252 SD 50 and 234 incendiary bombs without sight of the ground. The impacts of the bombs ran transversely across the airfield, 3 fires were perceived.
German time then was GMT+2 hours.
The SD 50 was a 50 kg fragmentation bomb.
The unit concerned is not identified.