Anyone feeling threatened by a cold caller is urged to dial 999.

Police issued the advice after rogue traders targeted residents in North Norfolk.

It follows reports a white van man charged £220 for pressure washing a small drive in Cromer, while a man claiming to be from the council charged £250 for cutting back branches on a tree in North Walsham.

It is unknown at this stage if the two incidents are connected.

PC Pete Davison, North Norfolk Engagement Officer, said: 'Please remember you do not have to open your door to cold callers.

'If they are selling something or offering to do any work on your house or garden, tell them you are not interested and ask them to leave. If they persist tell them you will call the police and call us on 999.

'Often such traders don't provide full names, trading addresses or contact telephone numbers, resulting in it being virtually impossible to trace them if there are any problems with the work or goods.'

Anyone with information about suspected rogue traders should contact police on 101 or call Crimestoppers anonymously on 0800 555 111.