The problem with many UK doors is that the trees are felled in the morning, sawn into planks by lunchtime, then made into doors before teatime.
The still-dripping-wet wood itself is probably some cheap knotty Pine, and the actual door-making process industrialised and shoddy.
Almost everyone I know who still has old fashioned wooden doors, has problems with them. With the UK's dampish climate they shrink or swell, and split or stick (depending on the season). They can be a right pain in the neck. We have already had to have a carpenter to see to two of our outside doors this winter.
So, up the road, my son Kimbo has decided to do something about the problem, and has installed a new 'state of the art' non-wood door. This isn't the standard composite door, but a new very solid 21st C version.
He has now also installed the black and gold house number on the borrowed-light above, and it looks very 'chic'.
I went by yesterday morning to inspect the work, and it looks superb. The door doesn't look that different to the last one, but it's really solid, and will remain un-swelled for decades to come; if not centuries. Well done Kimbo!
p.s. Looking at the photo, I'm wondering if those wires up the wall are actually doing anything. They look to me like the old GPO wiring, where they took whatever was the most direct route, regardless of aesthetics. Horrible; I shall make enquiries.