Kate’s carol service message: You were by my side

There will be famous performers at the concert, including Richard E Grant, Paloma Faith, Olivia Dean and Gregory Porter, along with guests who have worked hard to help others in their communities.

It is intended to show support for those who have had tough years, including families of those caught up in the Southport knife attacks, whom the princess visited in October.

Olympic and world-champion cyclist Sir Chris Hoy, who also received a cancer diagnosis this year, will be among those lighting candles.

But much of the focus will be on Catherine, Prince William and other Royal Family members at the service.

The language in the run-up to the carol concert has been strikingly emotional, calling for greater empathy for those facing difficulties.

“Love is the light that can shine bright, even in our darkest times,” Catherine wrote in a letter to guests invited to the concert, which is being recorded for an ITV programme on 24 December.