I shared a house with 2 other women in Reading, back in the late 80s. Anne, and Michelle. It's important to understand the layout of the house:
The stairs were immediately in front of you when you opened the front door and at the top of the stairs was an airing cupboard with the hot water tank. The door to the cupboard had a ball-catch which was really stiff. You had to pull the handle hard to open it - and the bottom of the door also dragged on the carpet.
Downstairs, to get to the sitting room, you had to take a left through the kitchen. Then the sitting room ran across the back of the house, with a conservatory going across the width of the house on the back.
There was a lot of glass in the windows and doors and I started to notice shadows in my peripheral vision, but when I looked directly, there was nothing there. I assumed it was because of all the glass.
We then had a problem with the phone line. It would cut off mid-call, or we couldn't get a dial tone. The BT engineer was out to the house more times than I can count. He must have changed almost everything it was possible to change - but there was no difference. None of our neighbours had the same problem.
The conservatory was always freezing. FREEZING. Even in the summer. And none of us used it - it just felt bad.
So, Anne had a boyfriend called Ady. He would never sit downstairs with us, but instead go straight up to her room. We got used to hearing the front door close and him going up the stairs.
About the time I started noticing the shadows, I also started noticing that the airing cupboard door kept swinging open. Eventually, I mentioned it to Anne and Michelle and they were both amazed because they'd noticed it too - and hadn't wanted to say anything. I asked if Ady had heard or seen anything as it was only an hour or so since it had last happened - and Anne told me he hadn't visited for 2 days - yet I'd clearly heard footsteps on the stairs.
[as I'm writing this, I'm shivering - and it's bringing back some tricky memories]
One night, I was working late and I got back to the house to find Anne had covered up the glass doors into the conservatory with a blanket. It seems her and Michelle had decided to 'exorcise' the conservatory and she was convinced she'd seen something. I went mad. For the same reasons as I would about a Ouija Board.
Brian, my then boyfriend and soon to be husband, went into the conservatory and challenged whatever it was to show itself. To this day, he won't talk about what he saw/felt. And he's not the kind of guy that scares easily.
Soon after, Anne woke up in the middle of the night and she was climbing out of her bedroom window. If she hadn't woken up, she'd have gone through the conservatory (glass) roof. Her headboard was on the shared wall with the airing cupboard.
I moved out.