Fictionally it is situated in the north of England.
In reality it is here, in the Cotswolds.
I am sure that many of you with sharp eyes will recognise this house - the home to two of the fictional characters.
Both the exterior and the interior of the church have had starring roles in the fiction. However, the church is a star in its own right. It was in existence before the Norman Conquest. The earliest part of the church dates from the middle of the 11th century; in the chancel there is some very early herring-bone Cotswold stonework.
A photograph of the original deed given by William the Conqueror.
Comment moderation has been set to give everyone a chance. If you get it right I will withhold your answer until I reveal the name on Monday at noon Grenwich Meantime.