Homeowners have been warned about rogue traders cleaning roofs without permission before demanding payment for the rest.

Trading Standards and Sussex Police are investigating several reports of people cleaning a small section of roofs and driveways in Worthing without the owners' permission then pressuring them into paying to complete the job.

A Neighbourhood Watch alert said water from fire hydrants was being used to do the illicit works.

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Worthing-based Police Community Support Officer Ed Mitchell issued a warning to his followers on social media. He said: "Receiving multiple calls of rogue traders jet-washing roofs in the Worthing area.

"They will clean a small patch without permission to persuade their victims in getting the work done."

A picture of someone's house, with a square patch of roof cleaned, was shared by the officer.

One commenter replied: "The same happened to my mum in Steyning last week, wanted £300 to jet-wash her drive. Now has a random clean square."