Briton Tom Butler believes he may have broken the world record for surfing the biggest ever wave after successfully riding a huge swell at Nazaré in Portugal on 14 December.

The 29-year-old says the wave was estimated to be more than 100ft tall. The current official record is 80ft, which was set last year by Brazilian Rodrigo Koxa also at Nazaré.

Butler said surfing the wave was like 'running away from a raging bull'. It is likely he will have to wait for the WSL Big Wave Awards in April 2019 for official confirmation on whether he broke the world record.