A few weeks ago when I was walking back from the shop a man was crawling his car by me and when I got just outside the house I live in I told him to f off and he driven off. Walking back today from the bus to the house I live in I saw him again (it was definitely the same man) he stopped his car by me and asked if I wanted a lift and I just kept walking and he drove off. He must drive up and down this road frequently. The problem is I don't know the make of his car I couldn't evan guess nor do I know his registration or what he looks like. Is it worth informing the police on the non emergency number?