Hundreds of people lined the banks of the River Severn in Gloucestershire on Wednesday for a four-star tidal wave.
Surfers compete to ride the Bore
The Severn Bore is a natural phenomenon in the estuary of the River Severn, where the tidal range is the second highest in the world.
The river's course flows past Avonmouth to Chepstow and Aust, then to Lydney, Sharpness and on to Minsterworth.
The Severn Bore has reached two metres in height and averages 16km per hour.
It is one of only three surfable tidal waves - the others being on the River Yangtze in China and the Bay of Fundy in Canada.
Each year dozens of surfers compete to ride the longest tidal bore.