Why is there a law that can imprison someone for life for simply wanting to imagine that the UK was a republic? Sign Petition to Repeal the Treason Felony Act of 1848

Welsh Socialist Republican Flag in 21st Century

In full, section three of the Treason Felony Act 1848 reads:

If any person whatsoever shall, within the United Kingdom or without, compass, imagine, invent, devise, or intend to deprive or depose our Most Gracious Lady the Queen, from the style, honour, or royal name of the imperial crown of the United Kingdom, or of any other of her