A group of us stayed at London House over New Years, and it was a fantastic experience. The house is beautiful, it and the region is the sort of so exceedingly authentically quaint that you only read about in books.
As a professional live experience designer, my #1 most important positive recommendation is, this space is architecturally perfect for groups. It's connected enough that everyone can get together and be cozy in multiple configurations, but spaced out enough that privacy for many people at a time is never far away. There are two routes to every place, which is absolutely critical to preserving dynamism. You have a constant sense in the house that you're going about life, turning a corner, and finding a new group of people to optionally interact with-- the perfect balance of engagement without pressure. Sound carries enough that you don't feel isolated, but not so much that you'll actually get disturbed by other people talking. Spaces are big enough to fit groups, but asymmetric to offer variety, and not so big that everybody will just sit around and stare at each other without knowing what to do. (I literally do this for a living, and this house is in the top 90% percentile in these areas that have a huge impact on experience quality.)
Other useful notes:
The kitchen and living space was exceptional. We cooked nearly every day, and benefited heavily from the wealth of exceedingly high quality equipment that probably cost as much or more than our entire weeklong stay, some of it professional-grade.
The house TRULY IS hypoallergenic, which is very unexpected given the amount of mold and wear in the region. With multiple super-allergic-to-everything people, we were very concerned, but we didn’t react at all.
The owners were incredibly kind and considerate. They let us check out the house in advance. They got back to all of our questions within hours. They were very happy to accommodate our numerous special requests.
Unlike the other reviewers, we didn't touch the marmite :-) But, it and the thoroughly London theme inside were a really fun touch.
The one thing to know about the house, which is not obvious from the info, is that it is in a (tiny, one-road) town, not alone in the countryside.
In winter with the heat on, it can often be dry. We left a wet towel in our bedroom at night for humidity.