Britannia (Schiff, 1778)

HMS Britannia (1762) was a British 100-gun 1st rate ship of the line which fought at the Battle of Cape St. Vincent (1797) and at the Battle of Trafalgar, where she carried the flag of Rear-Admiral of the White William Carnegie (1756-1831), Earl of Northesk.

The ship renamed in 1810 as Princess Royal, in 1812 as St. George and in 1819 as Barfleur.

This was third of seven ships to bear the name Britannia, and was broken up in 1825.