Wearing hooded, full-body wetsuits, a group of surfers took to the River Severn estuary in Newnham, Gloucestershire, to ride one of the world's largest tidal surges - The Seven Bore. The wave, which is caused by changing water levels, travels against the river current at around 13 miles per hour and can sometimes climb to two metres high. There are about six main points along the 20-mile stretch of river where the wave is at its strongest strongest, with dozens of surfers and kayakers racing to meet the wave at each point. Bores are usually at their highest when the water levels are low, but huge amounts of rainfall in the West Country over the last few weeks mean the waves have still not reached their peak.(dailymail.co.uk)ANN.Az