The Guardian has an editorial arguing the case for a future secular event.
According to the British Monarchy website, a meeting of the Accesssion Council is called as soon as practicable in a new reign -
All members of the Privy Council are summoned.
The Lord Mayor and Aldermen of the City of London and High Commissioners of Realm Commonwealth countries are invited to attend.
Following the proclamation, the Sovereign reads a declaration and takes the oath to preserve the Church of Scotland.
The oath known as the accession declaration - an oath to maintain the established Protestant succession - is normally made at the next State Opening of Parliament.
In London the public proclamation of the new Sovereign is first read out at St James's Palace.
The proclamation is also read out publicly in Edinburgh, Cardiff and Belfast. In each city the accession is traditionally proclaimed at several different spots.
I would suggest that some of those proceedings could be conducted publicly, at the start of a reign, and in a secular arena.
The oaths concerning the Church of Scotland and the Protestan succession need careful consideration though.
Then a Christian Coronation could still be held, say within the next 12 months, in the Abbey.
Responses are not allowed!