When the vote came the reaction was one of uncontained joy.

It wasn’t the end of Brexit, but for those who had come out in their hundreds of thousands to protest against Boris Johnson’s deal, Sir Oliver Letwin’s amendment was a new obstacle in its path.

There were huge cheers from the crowd in Parliament Square as the result of the vote on the amendment was announced.

Feelings ran so high that although the march was overwhelmingly peaceful, Jacob Rees- Mogg, the Leader of the House, and his son Peter were heckled as they walked home under a police escort.

Michael Gove and Andrea Leadsom also received police escorts away from Parliament at the end of the first Saturday session since the Falklands War.

Police said no arrests had been made by the time the march officially came to an end.