The real expert on this is my wife. She's the one who found it, realised it wasn't just more beams and found someone who could identify it.
It could have looked something like
this originally. But in a town, not countryside and probably owned by a merchant. Over the years, the middle bay got split into separate plots and built out at the back. So we'd be the near part of the middle bay. Lots of bits were added on, and as you go away from the street, the building gets younger, till at the back it's victorian.
Outside isn't that interesting, too many later additions. I did take a some pictures out of the window before Christmas when it was snowing.