Nottingham Knockers have been visiting Longparish and the surrounding area recently. You do not have to open the door to strangers, nor do you have to buy anything from them. You should certainly never feel intimidated by visitors. Do not call any number on an offered card/ID card to verify that they are genuine. Such numbers will not be for genuine organisations at the other end of the telephone line.  If in doubt, say you will call the Police (call 101) to check.   For further advice: