The invitation to people to make their homage by participating in a "chorus of millions of voices" was listed among the new elements of an ancient ceremony in a statement from Archbishop of Canterbury Justin Welby's office.

That part of the liturgy reads: "All who so desire, in the Abbey, and elsewhere, say together: I swear that I will pay true allegiance to Your Majesty, and to your heirs and successors according to law. So help me God."

In other firsts, the service will include other languages associated with the British Isles – a prayer in Welsh and a hymn in Welsh, Scottish Gaelic and Irish Gaelic -, and female bishops will be able to participate, the statement said.