This one's called Swallow. It's a lodge on Gonerby Moor in Lincolnshire. Detached. You're right by the fishing lakes here, you've got a view over one of them.
It's a 5 Star lodge, so it's comfortable and everything works. It's open plan inside. Two bedrooms, sleeps four. One bathroom with a shower. Everything's on the ground floor and there's an accessible entrance, so the steps aren't an issue.
Outside, you've got your own patio area with furniture. It's quiet. The site has three lakes for fishing and it's just for guests staying here. They say there are big catfish in there.
You're a bit out on your own. The nearest shop, pub, or restaurant is about two and a half miles away. You'll need to drive.
For walks, you can go around the park itself or head out into the lanes. There are cycle routes starting from the gate if you bring bikes.
Grantham is about seven miles. It's got the mainline train station if you wanted a day in London. It has all the usual supermarkets and things too.
Within half an hour's drive you can get to Belton House, which is National Trust, or Burghley House near Stamford. Lincoln is about 25 miles north, the cathedral and castle up on the hill are worth seeing.
Facilities: Wifi is included, there's a washing machine, bedding and towels are provided. There's parking right by the lodge. No pets, I'm afraid.
Useful links: National Trust Belton House and Lincolnshire Countryside Walks.