The Vigil of the Princes will take place this evening and will be carried out by King Charles, Princess Anne, Prince Andrew, and Prince Edward.
The Queen's children will mount guard at the four corners of the catafalque in Westminster Hall for the 15-minute vigil at 7.30pm.
All will be in military uniform, including Prince Andrew, who as a non-working royal has been granted dispensation to wear uniform for this moment as a mark of respect.
A similar vigil also took place in Edinburgh earlier this week with some 33,000 people filing through St Giles’ Cathedral to pay their last respects.
Read more on manchestereveningnews.co.uk