I'm a 25 year old woman living alone with two dogs in a terraced house. All houses in the row have an individual garden both in the back and front. I rent, most other people in the row own their house.
Next door has recently decided to renovate their back garden, including installing an (ugly) garage in there, building higher fences and a built in kennel for their three dogs. Wasn't bothered about any of this. To be honest I don't particularly like them that much so I don't mind not seeing them 
I came home from an overnight shift today at 7am. Parked behind my back gate as usual and found a random man on a stepladder in my garden painting the fence with Cuprinol! My other neighbour had let my dogs out in the garden at 6:30am for me as she always does when I'm on nights (lovely 89 year old lady who's recently been widowed, I pop in with dinner about twice a week for her and generally check she's okay since she's too depressed to cook for herself atm, her family can't be around every day and so she insists on doing this to 'repay' me) so they were milling around in there happily sniffing at his ladder (lucky I don't rely on them being guard dogs, isn't it!). Oddly enough, they haven't attempted this with the neighbour on the other side of them who has a massive Boerboel in the garden. Neighbours knew I was out for a night shift since they made a bit of conversation when I was leaving last night in my uniform and my car wasn't there. I'm usually back at about 9am but my shifts has ended early
Confronted him and asked who he was, he said the neighbours doing the garden renovations had said I'd given him permission to come into my garden and paint that side of the party fence. Pointed out that I clearly haven't as the gate was double locked and the dogs were out! Tells me 'sorry I thought you'd forgot so I hopped the fence, oh well love let me finish and I'll get out, you'll have to speak to [male neighbour]'. I told him certainly not and to get the fuck out of my garden now before I called the police. Told him that misled by my neighbour or not, I'm telling him right then and there that he had no permission to be in there.
Once he was out of the garden and I'd locked my gate properly again, I went round to knock on the neighbours' front door and ask what the fuck they're playing at. No answer, although they were definitely in, I could hear CBeebies blasted through the wall to my living room for their DS and their cars were all in their usual parking spots. I went upstairs for a wee (bursting at this point 
) and through the bathroom window I could hear the male neighbour, female neighbour and the painter in his garden bitching about me, calling me a rude bitch! I shouted down mid wee that no, I wasn't, and asked if it was okay for me to come in his bloody garden without permission! No answer to that one.
Neighbours won't answer the door to speak about it and I'm tired after a night shift and I don't feel I can go to sleep until this is sorted lest this cheeky man hop my fence again 
To be honest if they'd asked and had it done on a day I was in, I'd have given them permission!