On 16 October 1834, two careless workmen set fire to the Houses of Parliament. The sprawling medieval complex was almost entirely destroyed in perhaps London's most famous conflagration between the Great Fire and the Blitz. The charred remains would eventually be cleared to make way for the grand Neo-Gothic buildings that still stand.
Tomorrow, historian Caroline Shenton, author of The Day Parliament Burned Down, will recreate that fateful day on Twitter. She'll tweet out the key developments, as they happened in real time, beginning with the causal balls-up at 6.30am.
Follow along on @parliamentburns, and contribute to the discussion with hashtag #parliamentburns.