What is the Thames river's source?

Something like three-quarters of the River Thames is not in London. Head west, and the river meanders through Windsor, Marlow, Henley, Reading and Oxford. Keep heading west and you'll eventually reach parts where the Thames is a mere trickle. But where does it begin? read more

The River Thames (/tɛmz/ ( listen) TEMZ) is a river that flows through southern England, most notably through London. At 215 miles (346 km), it is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn. read more

River Churn, whose source is officially the Seven Springs, is a tributary of River Thames joining the Thames at Cricklade. As the Seven Springs lies further from the mouth of River Thames than Trewsbury Mead, its adoption as the actual source would mean that the River Thames is the UK's longest river. read more

The source of the Thames is a spring called Thameshead. The spring is supplied by water deep under the ground. It is marked by an ancient ash tree and a stone engraved with the words: 'The conservation of the River Thames 1857-1974. This stone was placed here to mark the source of the River Thames.'. read more