It acquired...central heating.
This may not sound particularly thrilling to you, but to me, this is the best £4k I have ever spent. Before, the house had ancient electric storage heaters which cost a fortune to run, and as we discovered once it got properly cold, don't actually warm a room beyond the four feet directly in front of the heater. Additionally, the bathroom featured a miniscule hot water heater which was at least 30 years old and probably half full of limescale. We could take 1.5 showers (note: 2 people + 1.5 showers == 1 unhappy person*) OR 1 bath per day. If we did either of the preceding, we couldn't wash the dishes in hot water.
I'd gotten used to the shower/bath situation. I'd even gotten used to getting home and putting on more clothes than I was wearing when I was outside. After three months of scrubbing greasy pans in cold water, though, my patience was wearing thin.
I would post pictures, but I don't think photos of combination boilers and radiators are all that exciting. Pictures of the glorious bubble bath I'm going to take in a few minutes might be more interesting. However, the internet has yet to see naked pictures of me and I think I'll keep it that way.
* Since I get up early to commute to London, Unhappy Person was almost invariably the bloke. Poor man.
ETA: You can have some pictures of the kittens. Because they're cute and fluffy.