These may be related to Operation Vulcan. The executed Iraqi seems to have specialised inter alia in airborne radiation monitoring equipment. It may have been kit he designed which was on that King-Air which crashed so mysteriously whilst on an overflight of the Olympics site. It may also played a role in spotting nuclear material on a German-owned freighter, recently abandoned on the high seas in very odd circumstances. Most at-sea rendezvous between freighters and submarines tend to arouse suspicion.
The police as usual are downplaying any intelligence connection, but since when have the police ever told the truth about intelligence matters?