Stormont party leaders are set to be among the huge gathering of royalty and politicians from the across the world attending the state funeral of Queen Elizabeth II.
Heads of state, prime ministers and presidents, European royals and key figures from international public life are being invited to the service at Westminster Abbey, which can hold a congregation of 2,000.
The ceremony in London on Monday, which has been declared as a bank holiday, will be broadcast live and will involve a national two minutes' silence.