Health and Safety Executive decide formal investigation not required.

The Health and Safety Executive (HSE) has closed its investigation into the controlled explosion at Pinewood Studios that left one crew member with minor injuries.
The explosion, which was reported to be a test prior to filming, injured one person outside the 007 Stage after panels were blown off the exterior. However a spokesman for the HSE told the Press Association:
“After an initial assessment, we concluded there is no need for a formal investigation and we consider the matter closed”.
The accident is reported to have delayed filming the the following night because essential equipment remained sealed off on the damaged soundstage. Shooting was planned over several nights so it should be relatively easy to catch up.
Source: Gazette News