There's a Shitterton in Dorset too.
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You see the name: North Piddle, it gets it's name from the River Piddle. Back in the 19th century when the railways were expanding at a pace, they reached the town of Weymouth. Prince Albert loved Weymouth and he took his family there. To spare royal blushes as the train crossed the River Piddle, the railway company covered the river Piddle sign so that it read: River Trent.
For those unfamiliar with Brit slang, piddle is a slang term for urinate. It's not a profanity, it's more on a par with the word fart.