There was much talk of the special relationship between the UK and the US this week; both David Cameron, UK prime minister, and Barack Obama, the US president, kept mentioning it at the White House. But the more intriguing relationship is that between BP and Libya.
There is no evidence that the oil company directly lobbied the British government for the release of Abdel Basset al-Megrahi, the Lockerbie bomber, but it admits to backing a prisoner transfer deal with Libya in 2007. Two years later, Mr Megrahi was home and BP had its offshore drilling rights. Crude oil indeed.
Even if Mr Megrahi had been released in a direct quid pro quo for BP obtaining the contract, rather than on dubious health grounds, no law would have been broken. Had BP bribed Libyan officials with hard cash, it would have been in trouble under the US Foreign Corrupt Practices Act, but commercial realpolitik is not illegal.