There is a man who used to live in our house - I don't know how long ago but it must be at least 17 years ago because we have lived here 10 years and the previous owners lived here 7 - who keeps coming round. He seems to have mental health issues because he talks out loud saying really strange things when there is nobody there. I think he may come round quite often when we're not in because I find piles of takeaway menus or letters etc in the front garden. I don't think he's stalking me but he seems obsessed with the house. Today I heard him outside talking to himself saying some weird and some fairly obscene things and he was sitting on our front step with records and paperwork and a drink all piled up beside him. I had to go out to get the kids from school and the only way I could leave (it being a narrow step) was to open the door and tell him to go. I felt very nervous and intimidated because being on my own I thought there was a risk he might try to get inside the house. He did clear off leaving piles of paperwork on the front step. I'm not sure he's committing any offence and I have no evidence that he is dangerous in any way (though none that he's not) but I feel quite shaken after today's encounter. Any advice anyone? Thanks.