who won the battle of trafalgar and what was the significance of the outcome for napoleon?

At sea, Lord Nelson and the Royal Navy consistently thwarted Napoleon Bonaparte, who led France to preeminence on the European mainland. Nelson's last and greatest victory against the French was the Battle of Trafalgar, which began after Nelson caught sight of a Franco-Spanish force of 33 ships.

The Battle of Trafalgar was important because it established British naval supremacy for more than 100 years. The battle also shattered Napoleon's plans to invade England.