1969 - Monty Python was formed. A taping of “Do Not Adjust Your Set” brought together comedians Graham Chapman, John Cleese, Terry Gilliam, Eric Idle, Terry Jones, and Michael Palin.

1824 - The National Gallery in Trafalgar Square, London opened to the public. It houses a collection of more than 2,300 paintings dating from the mid-13th century to 1900.

1662 - The first recorded Punch & Judy show in Britain is widely accepted to have taken place in Covent Garden, London, in May 1662. The performance was observed by Samuel Pepys and documented in his diary, although he didn't specifically name it a Punch & Judy show.

1984 - The Thames Barrier is officially opened, preventing the floodplain of most of Greater London from being flooded except under extreme circumstances.

1765 - HMS Victory, the ship which became the flagship of British Admiral Horatio Nelson, was launched at Chatham. The ship is preserved today as a historic relic at Portsmouth.

1979 - Six rock-cut tombs at Heysham in Lancashire became Grade I listed and a Scheduled Ancient Monument. Further excavation in 1993 on land below the stone coffins showed that the site had been occupied about 12,000 years previously.

1980 - The SAS stormed the terrorist-occupied Iranian Embassy at Knightsbridge in London. Four gunmen were killed in the attack and all 19 hostages were rescued.

1471 - Edward IV defeated a Lancastrian Army and killed Edward, Prince of Wales. Many of the Lancastrian nobles and knights sought sanctuary in Tewkesbury Abbey although the Abbey was not officially a sanctuary.

1926 - Britain’s miners walked out and in a move of solidarity, workers from other industries joined them. This was the first ever general strike in Britain. By 4th May, the number of strikers had reached 1.5 million.