Hedgerley Mill

Roy says, if you straighten it up a bit and crop that raggedy bit off the left-hand tree, it should be okay.

Cropped. It's straight - NB end of RH is parallel with the frame.

Glad it can stay. On Flickr it's in an album called "January-July 2022", and it rounds up the number of pictures in that to 160. Before it was 159 and I don't like odd numbers.

The windows are leaning to the right, and the RH edge too, if you include the lower part.
And the top needs cropping just below that 'hole' in the LH tree. Otherwise, it's an okay shot.

But you don't need Roy's permission to keep it on display.

Measured with my ruler, the RH edge is dead parallel with the frame. The windows aren't completely straight on the building (subsidence is normal in buildings of that age, especially when their foundations are by water. But this was compounded by the barrel distortion from the zoom lens on my compact camera, which PhotoMatix (which I normally use) doesn't correct. Accordingly, I've re-developed the RAW file in other software which does.

You're talking over my head with all the technical stuff. Instead of using your bedside ruler, you can line up the verticals with the straight edge of the note box, and the slight lean becomes evident. But the top looks better now.