Google map showing the River Thames from the Source, near Kemble to Lechlade.The Official Source of the River Thames. Kemble, UKThis tube carries the Thames beneath the A433. Thames Head, near KembleThe A433 - The first crossing over the Thames. Near Kemble.Thames Head. River Thames, Kemble.Thames Head, near KembleDry river bed, near the Source of the River Thames, Kemble.Thames Head, near KembleThames Head, near KembleThe ditch heading towards Lyd Well, Thames Head, near KembleThe ditch heading towards Lyd Well, Thames Head, near KembleFirst water visible in the River Thames,  January 2017. 1 mile from the Source at Kemble.First water visible in the River Thames,  January 2017. 1 mile from the Source at Kemble.The second bridge over the River Thames. 1 mile from the source at Kemble.Lyd Well, near Kemble, River ThamesDawn at Lyd Well. Water is currently emerging from underground forming the start of the River ThamesDawn at Lyd Well. Water is currently emerging from underground forming the start of the River ThamesDawn at Lyd Well. Water is currently emerging from underground forming the start of the River ThamesDawn at Lyd Well. Water is currently emerging from underground forming the start of the River ThamesDawn at Lyd Well. Water is currently emerging from underground forming the start of the River Thames