I moved into a flat
There was a cat flap which was locked.
Then we realised that there was a very young cat hanging round in our garden. He looked small, thin and scared.
As soon as we opened the back door he meowed at us, but ran away.
I had recently lost my cat who had run away from my mum's house. (we found her, when she turned up again at mum's house very thin and looking sorry for herself about 5 months after she disappeared)
Anyway, small thin grey tabby in the garden.
I bought a tin of cat food and put some on a plate in the house, right in through the kitchen, propped the back door open and sat next to the plate and waited.
5 minutes later he crept in very scared and started scoffing the food. I gently reached over and he flinched, and then as soon as I stroked him it was like he breathed a sigh of relief, rubbed his head against my hand, calmed down, finished his food, and curled up on the sofa and never left!
Turns out he belonged to a house a few doors down, but she had given up on him and didn't want him. The previous owners of my flat had been feeding him in the garden because they felt sorry for him.
He was about 6 months old, and the loveliest gentlest thing soppy thing.