Organisers of the event said the police asked for a written guarantee that the author would not attend.

BBC: Salman Rushdie

She said she had received a written guarantee from FG Wilson that it still had a long-term commitment to Northern Ireland.

BBC: FG Wilson: 760 jobs to go in Northern Ireland

He suggested that Guillermo Oliveri, the deputy minister in charge of religious matters, give the Vatican a written guarantee of the bishop's freedom to perform his church duties.

ECONOMIST: The president meets his match