The Lockerbie segment was broadcast on Newsnight on Wednesday evening after all. I have just watched it on the Newsnight website. The programme concentrates on the famous fragment of circuit board that supposedly came from a MST-13 timer, supplied by MEBO principally to Libya.
The programme mentions the concerns that often have been expressed about the provenance of the fragment, about its identification, about the forensic scientific processes to which it was (or was not) subjected and about deficiencies in the record keeping relating to it. But by far the most important revelation in the programme is the evidence of experiments conducted by top explosives expert, Dr John Wyatt. In twenty controlled explosions of suitcases packed as the Lockerbie one was alleged to have been, no such fragment of timer circuit board ever survived. According to Dr Wyatt, the contention that such a fragment survived the Pan Am 103 explosion at 31,000 feet is simply "unbelievable".