In 1999, less than a decade after the UN sanctions were put in place, Libya began to make dramatic policy changes in regard to the Western world, including turning over the Lockerbie suspects for trial. This diplomatic breakthrough followed years of negotiation, including a visit by UN Secretary General Kofi Annan to Libya in December 1998, and personal appeals by Nelson Mandela. Eventually UK Foreign Secretary Robin Cook persuaded the Americans to accept a trial of the suspects in the Netherlands under Scottish law, with the UN Security Council agreeing to suspend sanctions as soon as the suspects arrived in the Netherlands for trial. Libya also paid compensation in 1999 for the death of British policewoman Yvonne Fletcher, a move that preceded the reopening of the British embassy in Tripoli and the appointment of ambassador Sir Richard Dalton, after a 17-year break in diplomatic relations.