And though the lords were clad in their red and white ermine cloaks and ambassadors from around the world wore colourful national costumes, at least nobody turned up in a suit of armour. Illegal.
Other rules deemed utterly stupid included one that permits a pregnant woman to urinate in a policeman's hat and murdering bow-and-arrow-carrying Scotsmen within the ancient city walls of York, Scotland.
A law stating that in Liverpool, only a clerk in a tropical fish store is allowed to be publicly topless, was also ridiculous, said the poll.
A spokesperson for Liverpool City Council told the Telegraph the "law" was a myth and had no basis in fact.
Nearly half of those surveyed admitted to breaking the ban on eating mince pies on Christmas Day, which dates back to the 17th century and was originally designed to outlaw gluttony during the rule of the Puritan Oliver Crowmell.
Respondents were given a shortlist and asked to vote.
Most ridiculous British law:
1. It is illegal to die in the Houses of Parliament （27 percent）
2. It is an act of treason to place a postage stamp bearing the British monarch upside-down （seven percent）
3. In Liverpool, it is illegal for a woman to be topless except as a clerk in a tropical fish store （six percent）
4. Mince pies cannot be eaten on Christmas Day （five percent）
5. In Scotland, if someone knocks on your door and requires the use of your toilet, you must let them enter （four percent）
6. A pregnant woman can legally relieve herself anywhere she wants, including in a policeman's helmet （four percent）
7. The head of any dead whale found on the British coast automatically becomes the property of the king, and the tail of the queen （3.5 percent）
8. It is illegal to avoid telling the tax man anything you do not want him to know, but legal not to tell him information you do not mind him knowing （three percent）
9. It is illegal to enter the Houses of Parliament in a suit of armour （three percent）
10. In the city of York it is legal to murder a Scotsman within the ancient city walls, but only if he is carrying a bow and arrow （two percent）
