Pressure increased on Gordon Brown to disclose details of trade deals negotiated with Libya after it emerged that three ministers visited the country in the 15 months leading up to the release of the Lockerbie bomber.
Lord Jones, then trade minister, travelled to Libya in May last year to speak to business representatives, the Cabinet Office confirmed.
Former health minister Dawn Primarolo conducted talks with the Libyan prime minister last November, and Bill Rammell, then Foreign Office minister, held discussions with his Libyan counterparts in February.