World's Larges Tidal Bore, 9 Metres (30 Ft) High, Qiantang River, China

River Mersey
The Severn bore on the River Severn, Wales and England, up to 2 metres (6.6 ft) high
The Trent Aegir on the River Trent, England, up to 1.5 metres (4.9 ft) high. Also other tributaries of the Humber Estuary.