Mystery interior

Do you know where this pretty panelled room is situated?

Whilst this photo is not publication-perfect, it shows the reality of photographing so many of the places we visit. The sensor on the table, is not attractive, but it plays a vital role in monitoring humidity levels in this historic building; Something I became very familiar with when I worked in a museum. The lights are actually just lamps placed on wall brackets, and we think they are charming in their own quirky way.

One clue: this house is located in the South West of England