Yes there's a diagram (though a badly drawn iPad one!)
The blue squiggle at the top is me, in a marked bay. The red squiggle is her car, not in a space.
I live in a maisonette block that shares with a line of bungalows. The road has a name which we all share, so our address is number (block name), road, town. The bungalows are number, road, town. The parking is for residents of the road (so the block and bungalows) Sometimes parking can be tight and all the spaces are taken.
Still with me? The bungalow residents are elderly, whereas the block of houses are a mix. Some of the bungalow residents seems to have taken a liking to some spaces and have started to block you in if you park in the ones at the end nearest the bungalows.
When I parked there, it was the only space left. I'll usually park along the bottom line if there is space. Went out today and I'd been blocked in, despite there being plenty of other spaces around (colour squiggles indicate a car in the space!).
I sat and beeped until this old lady came out, came over and said 'there's no need to beep, you could have just knocked on doors' I said I didn't think it'd be very productive to knock on 30 doors and it'd be easier if I wasn't blocked in. She then asked if I had MS (she said she does) and that's why she needs that space. It's not and has never been a disabled space. We do have two disabled spaces that I never park in!
No apology whatsoever, I asked why she blocked me in when there were other spaces and she replied that I'm more able bodied than her and this space is closer to her house so I shouldn't park there. I again asked why she'd blocked me in though and she wouldn't answer so I said she was clearly looking for an argument. She said how would I like it if I couldn't park outside my house - I told her that happens quite often and when it does I park on the main road and walk in!
She finally tried to justify her doing it saying I'd been parked there all weekend - I said that's because I don't work weekends and I live here - I'm allowed to park for a weekend! It hadn't been there a month. She then walked on and begrudgingly moved the car, which telling her neighbours (who'd come to gawk) how awful I was. I'm raging!