Pitstone Windmill - waiting for harvest?

Pitstone Windmill is a Grade II* listed windmill in England which is thought to date from the early 17th century. It stands in the north-east corner of a large field near the parish boundary of Ivinghoe and Pitstone in Buckinghamshire, and belongs today to the National Trust. 
It was abandoned in the 1930s and taken over by the National Trust. In the 1960s a group of enthusiasts raised the money and restored the mill. It does not operate as a mill because of the  stress exerted on an old timber building by the wind. 
It does open to the public from time to time and today was such a day.