Curlie

Thames

The River Thames is most noted as flowing tbrough the capital of the United Kingdom, London.
By this point, the river is tidal, and known as the Tidestream of the Thames, which stretches east beyond the: Thames Barrier and Dartford Crossing, becoming Sea Reach east of Tilbury and Gravesend.
This region, and the area of sea east to the Dutch coast, separating the North Sea from the English Channel,: is represented by the Thames Estuary category.
Before London there are many tributaries flowing into the Thames, but perhaps the most significant is below Dorchester, Oxfordshire, where the River Thame joins the River Isis.
West of this confluence, despite the name, the Isis is considered as the Thames, with its source at springs north of Kemble, Gloucestershire.