I have never told a lie in my life

Wiki:

World's Biggest Liar is an annual competition for telling lies, held in Cumbria, England. Competitors from around the world have five minutes to tell the biggest and most convincing lie they can. Competition rules bar the use of props or scripts. Politicians and lawyers are not allowed to enter the competition, because "they are judged to be too skilled at telling porkies".

he World's Biggest Liar competition is held every November at the Bridge Inn, Santon Bridge, in memory of Will Ritson (1808–1890), a pub landlord from Wasdale, who was well-known for his "tall tales". One of Ritson's most famous fibs was that turnips grew so large in the Lake District that people carved them out to make sheds for housing sheep.

In 2008, John "Johnny Liar" Graham won the competition for the seventh time after telling the judges a story of a magical ride to Scotland in a wheelie bin that went under the sea. The previous year Graham's winning lie was that a World War II German submarine had invaded Britain to capture digital television decoders. Comedienne Sue Perkins won the competition in 2006, marking the first time in the event's history that a woman won the competition. Her winning tall tale was about how the ozone layer became damaged, ice caps melted and people had to be taken to work on camels. In 2003, Abrie Krueger of South Africa was named the world's biggest liar after telling a story about how he was crowned King of the Wasdale Valley. This marked the first time that a foreigner had won the competition, which was marked with allegations of Krueger having cheated. A Bishop of Carlisle was supposed to have once won the competition with the shortest-ever speech; he simply said, "I have never told a lie in my life."