Creepy Neighbour (50sM) Making Me Feel Unsafe In My (32F) Home

Just to clarify- I am the sister of the owner of this Dating.mobi account as I don't have my own.
Back in October, my boyfriend and I broke up and he moved out. It's a small rented terraced house in a little town in England. I wanted to stay because I love the house and the neighbours are generally lovely. Except for one who we'll call Rob.
Rob lives with his wife Laura (who I've always got on well with) in the house directly opposite mine. It started while my ex boyfriend was still living with me and he kept asking me why I had my blinds closed a lot of the time. He hinted he would prefer me to keep them open. This was all while my ex was at work. One time, he was chatting to me outside and my ex came over to ask me something and Rob snapped at him saying "excuse me, I'm talking to (my name)!" Which I thought was quite strange.
Another time he exited his house at the same time as me when I was on my way to work. He insisted on walking me to the train station (I worked in a bar at the time), he also got on the train with me all the way to the town I worked in, came into my work, sat at the bar and had a drink, and then left and went back home.
I haven't had much more interaction with him since then, just the occasional typical neighbour chat. I had Covid a few months ago and I was pretty much in bed for a week. A package was delivered to his house as I was isolating and couldn't get to the door. Laura text me and said Rob would bring the package round so I replied saying that I had Covid and it would be better if he just left it outside my door which he did (this is important for later).
Everything had been fine until last Sunday night. It was around midnight and I was still up watching TV in my living room. There was a knock at the door. I opened it and it was Rob. He was drunk and barged into my house saying he had come to check on me (I later found out that he was at a party at another neighbour's house and had snuck out to come knock on my door). I was quite forthright and said "Rob, what are you doing? Get out" he ignored me and announced that he wanted to make sure I was OK and said "don't worry, it's nothing sexual" which creeped me out even more. He said he was worried about me and then said "you didn't really have Covid did you? Did you lie about having Covid?" At first I had no idea why he would ask that question but looking back now, I think he could only have been referring to what I mentioned earlier. I assume he was annoyed that I had asked for the package to be left outside and thought I lied about having Covid so I didn't have to open my door to him.
The rest is all a bit of a blur as I was terrified. It's worth mentioning that my front door is the only way in and out of my house. I don't have a back door so once he was inside my house blocking the doorway I felt completely trapped and had nowhere to run. I can't remember much more of what was said but it took me a while to get him to leave. I asked him several times. I was left very shaken and have felt nervous ever since.
The next morning I received a text from Laura that said "We hadn't realised Rob left the party to come and check on you last night. When his depression is bad he likes to check on everyone because he worries about people. Sorry if he scared you, I know he can be a bit forward but he's harmless. Rob and I will pop round tomorrow to apologise in person"
I replied saying "ok, thanks" I was shaken up and didn't really know what else to say. I did consider telling Laura what actually happened but I knew she would tell Rob and I didn't want to anger him. Also, it's unlikely Laura would side with me and she may think I'm lying.
Over the next few days, Laura text me a few times and each time it was to say that he wasn't going to be able to apologise that day for various reasons (Rob was sick etc etc). Eventually she said Rob needed a few more days and I hadn't heard from her since. I figured Rob changed his mind or whatever but I'm not chasing them for an apology so I just left it.
This morning I walked the half mile to my local shop. When I got there, Laura was pulling up into the car park. She rolled her window down, looked at me with a sad, pitiful face and said "are you OK?" I said "No not really" and walked off. I felt annoyed that this promised apology never happened and I'm angry that I have been made to feel scared and unsafe in my own house.
After I got back from the shop. There was a loud knock at the door. I peeked through the blind and it was Rob. Alone. I felt sick to my stomach and started shaking. There was no way I was opening the door to him again. He knocked again, louder and quicker (they sounded like angry knocks) and eventually he left.
I have told my other neighbour, Dave, about what happened and he was very supportive and said he will keep his phone on loud in case I ever need to call or text him to come round. He also said that even if he is at his girlfriend's house, (which is a 5 or 10 minute drive away) he will happily leave if I need him to. This has obviously made me feel a lot better. My sister and her fianc? also know (but they are almost an hour away) and another 2 male friends who live near by also know. Dave does work though so he is out most of the day whereas I am working from home and in my house all day. He also mentioned that he has never liked Rob and he'd happily go round and speak to him (knowing Dave, this would not be a polite conversation, it would likely be a very aggressive demand that he leave me alone) I have declined this offer as I don't want to exacerbate the situation.
I am gobsmacked that both Rob and Laura thought it was appropriate for Rob to come to my house alone again and knock angrily on my door. I just want him to leave me alone. I considered texting Laura and basically saying "Please tell Rob to not come to my house under any circumstances. I am a woman living alone and what happened the other night made me extremely uncomfortable. I do not need an apology, I just want Rob to please leave me alone" I also considered even saying that if he comes to my house again then I will call the police. The problem with this is that Rob is quite an angry person and I am inclined to think that this would make him more likely to come knocking on my door. If I call the police and they go round and give him a warning, what happens after they've gone? What happens if Laura is out and Dave is at work and I'm alone in my house and he knows no one could get here quick enough?
Any advice on how to deal with this situation would be much appreciated.
TL:DR Neighbour is harassing me and I don't know how to deal with him.


Source.