The Prime Minister, David Cameron, has been challenged by Professor Robert Black QC to make available any evidence linking deceased Libyan leader Colonel Gadaffi to the Pan Am 103 atrocity, to the Dumfries and Galloway police.

The Prime Minister said yesterday that Gadaffi was responsible for the murder of WPC Yvonne Fletcher in 1984, the destruction of Pan Am 103 in 1988 and the supply of semtex to the IRA.

"First of all we are no strangers to what Gaddafi was capable of. He murdered the police officer on the street of London; he managed to blow up an airliner over the skies of Lockerbie; he gave Semtex to the IRA – Semtex that they’ve probably not even released even to this day. We know what he was capable of," Cameron said.

Professor Black has challenged the Prime Minister's assertion in relation to Pan Am 103, following revelations that the key witness linking convict Abdelbaset Al Megrahi to event was bribed by Scottish police, that the key forensics evidence was claimed to have been fabricated by former MEBO employee Ulrich Lumpert, and that the evidence surrounding the use of semtex in the destruction of the plane does not bear scientific scrutiny.

"If the Prime Minister has evidence that Colonel Gaddafi blew up Pan Am 103 (or ordered it to be blown up) I hope he has made it available to the Dumfries and Galloway police who, we are told, are still actively investigating Lockerbie," Black said.

The accumulated doubts over the safety of the conviction have led to the Scottish Criminal Cases Review Commission concluding that a miscarriage of justice may have occured. A petition is currently active before the Justice Committee calling for an inquiry into these events.