The River Severn is the longest River in the UK.
Although officially considered to be some 220 miles (354 km) long, the Severn starts its life from a small boggy patch, high in the Welsh mountains, on Plynlimon (Welsh Pumlumon).
The water trickles away and forms a stream, which eventually becomes a river, the "River Seven", for the remaining 158 miles (254 km) of its journey to the Bristol Channel. (ref Guinnesss Book of Answers, 1985, p 214)
However, even if the river part of the 'River Severn' is really only 158 miles long, it is still the longest river in the UK.
The longest river exclusively in England though is the 'Thames' at 215 miles (346 km) long.
INTERESTING FACTS
With a 14.5 metre (48 ft) rise and fall between peak high and low tides, the tidal estuary of the Severn seems to have the second largest tidal range in the world.
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The longest river in the UK is the river Severn at about 220 miles long.
The longest river is the Severn, closely followed by the Thames.
The 3rd longest is the River Trent
Longest River wholly in England, River Thames 215 miles / 346 km longthe river sevan!But realy Ur the biggest river in England
Its the worlds biggest because of the volume of water carried. It is not the longest.
the longest river in the UK is the severn river.
the longest river is the yangtzee
If you mean longest, that is is the 31st longest river in the world
the longest river in the worl uk in the giant finch on rye river
The River Betsiboka. But that's the longest river
Because it flows through Oxford and London and is the second longest river in the UK
river severn
It is accepted as the longest, but the Amazon is the biggest by water volume.
While the Nile in Egypt is the longest river, the Amazon in South America is the biggest river.