This happened to me yesterday, bloke claimed he lived downstairs at first, then next door. Had ?20 in his hand and said he needs money to get a taxi to Romford Hospital to see his wife. Got ratty when I said you can probably get there from her via train for that. Eventually said its not your problem and left. Then about half an hour ago someone rang the bell claiming they wanted to visit a Mr Smith, couldn't provide a first name, just said they were visiting. Eventually went away when threatened with the police.