When I lived in Northampton, I was once followed in the early evening (winter) by a man whilst walking around the edge of The Racecourse. The road where the bus usually dropped me off was closed and so the bus route was diverted so I was dropped off at the opposite end of the park than I needed to be. I should have walked back to where I normally would have crossed The Racecourse but I instead walked up and round the unfamiliar end of the park thinking it would take me to where I needed to be. As I walked it was almost completely deserted, and very dark in parts, but when I saw a man up ahead I felt relieved to see another human being in the same area as me (naive 20 year old). However, as I passed him, he stared at me really intently which made me feel very uneasy. I picked up my speed and looked behind me to check where he was and he was stood still watching me. At which point I was utterly freaked out and started walking faster, but to my horror I realised I could hear him close behind me. Then up ahead I saw two men walking together and exiting the park down an alley. So I ran after them with the man still following me, and then I walked as quietly as possible down the alley so the two men didn't know I was there. The man who was following me stopped at the end of the alley, presumably put off by the presence of the two other men, and then disappeared. I then followed the two men at a safe distance back to the main roads and eventually got home about 45 minutes later than I should have done. At the time, I couldn't understand why I had kept silent behind the two men but I now realise it was because I knew that the two men would deter the other man, but that I also couldn't trust the two men not to be dangerous to me also.
So from that point on I've been very wary about walking around unfamiliar places at night by myself. However, I have lived in my current town for most of my 40 years and I do feel safe here, and as a result, generally do walk by myself at night, although always along main roads and brightly lit places full of other people. I know it's not always safe to do this, as Sarah Everard's horrendous experience shows us, but I also don't want to feel like I have to constantly live in fear, or drive everywhere, or get my dh to go out for me.