At about 220 miles ( 354 km ) , it is usually considered to be the longest in the UK .
The River Severn ( Welsh : Afon Hafren , Latin : Sabrina ) is a river in the United Kingdom .
At about 220 miles ( 354 km ) , River Severn is usually considered to be the longest in the United Kingdom .
The River Severn ( Welsh : Afon Hafren , Latin : Sabrina ) is a river in the United Kingdom .