The Stables is at Weedon Hill Farm, on the edge of the village. It's a detached place, converted from an old farm building. You're surrounded by fields, so the view is just countryside. It's quiet.
It sleeps four. Two bedrooms and one bathroom. It's got a 5 Star rating, which means it's been done to a high standard. Everything should work and be comfortable.
There's a wood burner in the living room for colder nights. Outside, there's a patio with a barbecue and furniture, and the garden is yours to use.
The facilities are what you'd expect: a dishwasher, washing machine, WiFi, TV. Bedding and towels are provided. There's a cot and a highchair if you need them. Parking is right outside.
There's a shop and a pub about half a mile away in the village. The pub does food.
Locally, you can walk from the door. Silverstone circuit is about ten minutes' drive if that's your thing. For a day out, you've got a few options within half an hour. There's Canons Ashby, or Castle Ashby Gardens. Althorp House is nearby too. Bicester Village is about twenty minutes away for shopping.
If you fancied going a bit further, Stratford-upon-Avon, Blenheim Palace, and the edge of the Cotswolds are all roughly within a thirty minute drive. Oxford is a bit further, maybe 45 minutes.
Useful links: National Trust Northamptonshire and Visit Northamptonshire.