It's interesting to compare the Downing Street and White House versions of the Barack Obama -- Gordon Brown phone call. White House --
The President expressed his disappointment over the Scottish Executive’s decision to release convicted Pan Am 103 Bomber al-Megrahi back to Libya.
This is not mentioned in the Downing Street version.
Incidentally, here's the official Libyan account of a visit to al-Megrahi by representatives of the pan-African Parliament. It was pitched as revenge for a visit by Bulgarian nurses to the gallery of the European Parliament on 10 October 2007.