The following is taken from http://www.twa800.com/news/parkes-10-17-00.htm
JH Parkes 10 / 7 / 00
First letter to HSE
ALSO SENT TO MR DUCKWORTH AT HES HQ BOOTLE
SPD
C5 Senior Inspector of Explosives
Health and Safety Executive
Rose Court
2 Southwark Bridge
London SE 1 9 HS
Dear Sir,
THE LOCKERBIE DISASTER
22 / 11 / 00
I hereby make a formal report that I have discovered that illegal explosive substances were carried aboard Pan Am 103 the detonation of which caused the loss of the aircraft and 270 souls....
John Parkes Explosives Engineer