King Charles has been warned against "watering down" his coronation after banning robes and reportedly culling some non-royal dukes from the guest list.
The monarch has strayed away from over 500 years of tradition by telling peers to come dressed in what amounts to a business suit.
He told them to leave behind their robes and coronets, which denote rankings in the British peerage and date back to the 15th century, before they were standardised in the 17th century.
