The calls have been reported in the Hopton and Bradwell areas of Great Yarmouth, with the individuals attempting to engage with locals about their broadband speed. Norfolk County Council Trading Standards is urging people not to engage with the callers, who may use persuasive tactics to gather personal information or make claims of "special offers". "Our advice is never to deal with doorstep cold callers, which includes never allowing a cold caller access to your property and never agreeing to further visits from them or other people," a spokesman for Norfolk County Council said. Similar warnings were issued this month in Diss and Potter Heigham after reports of cold callers offering home improvement servicesA man has been stopping at properties in Potter Heigham, claiming he can see issues and offering to undertake repairs. "Anyone sighting cold callers in Norfolk please contact us through our partners the Citizens Advice consumer helpline or Norfolk Police," the spokesman added.