Which battle was closest to the capital city of London?

The battle closest to the capital city of London was the Battle of Barnet, fought on April 14, 1471, during the Wars of the Roses. Located just around 20 miles north of London, this battle was a significant conflict between the Yorkists and Lancastrians. It was notable for the death of the Lancastrian leader, Edmund Beaufort, Duke of Somerset, and marked a turning point in the struggle for control over the English throne.