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"Bristol Chanel" is more likely a brand of perfume than an aquatic feature!
[[File:River Severn and Victoria Bridge seen from Seckley Viewpoint - geograph.org.uk - 667436.jpg |thumb|300px|right|The River Severn, crossed by Victoria Bridge (Wikimedia Commons)]]
The Severn is the longest river in the UK at around 220 miles, rising at Plynlimon in the Cambrian Mountains of mid-Wales and flowing into the sea via the Bristol ChanelChannel<Ref Name = ‘Wikipedia’>Wikipedia</ref>.
The lower reaches of the Severn are relatively recent in geological terms. The Upper Severn used to flow into a large lake surrounding what is now Shrewsbury; this lake in turn drained into the Trent Basin. When the lake began to melt at the end of the last Ice Age, around 25,000 years ago, the original exit was blocked, probably by ice. The rising melt-water forced a new path through the ridge above [[Ironbridge and Broseley | Ironbridge]], creating what is now the Ironbridge Gorge and the new course of the Lower Severn to the Bristol Channel<ref>[[Bibliography#Books | Marshall (1989), p2]]</ref>.
