Graham Smith, the head of anti-monarchy group Republic, was detained in Trafalgar Square.
The 55ft fin whale had become a macabre attraction with people reportedly travelling to see it.
The Duke of Sussex looked happy and relaxed as he entered the abbey with his cousins Princesses Beatrice and Eugenie, the daughters of Prince Andrew.
King Charles III and the Queen Consort Camilla are accompanied by the King's Procession as they ride to Westminster Abbey in the Diamond Jubilee State Coach.
Crews work through the night to try and save boats and equipment at Bristol boat yard.
They were arrested on suspicion of breaching the peace and their "not my king" placards were seized.
Protester Matt Turnbull is one of the people arrested in the build up to the Coronation.
The King and Queen Consort waved to crowds as they arrived to prepare for the Coronation.
Famous faces gather for the Coronation service in London.
Constituents have been hit with repayment demands from HMRC after receiving tax rebates
Ant and Dec are among the celebrity guests arriving at Westminster Abbey for the Coronation.
Backers who want Wrexham to win City of Culture status hope football success will boost the bid.
A special King James edition of the book has been edited to be as close to a 1611 text as possible.
Voters explain why they voted for the Green Party, which secured a historic victory in a Tory area.
How different - or similar - did the capital look during the events held in the 20th Century?
Royal enthusiasts from Northern Ireland have camped out to reserve the best spot to see King Charles.
Follow the King's Coronation order of service, line by line.
Events will take place across Scotland as King Charles III is crowned at Westminster Abbey.
People across the UK and beyond are preparing to celebrate the coronation of King Charles III.
The Tories suffer from a competitive political landscape, writes BBC political editor Chris Mason.
Pages