Although I have only managed to visit a few, there are still a lot of barns in Berkshire. One group which is of particular interest are those with a ‘cranked’ or ‘curved’ under principal. This is a curved brace which fits between the tie-beam and the collar-beam. It serves the same purpose as a queen-post, but leaves a larger space between the braces. It is a feature of a large number of barns in the Berkshire, Buckinghamshire, South Oxfordshire region. They generally date from the mid to late 18th century. There is a good introduction to these barns in an article by David Clark in “Vernacular Architecture, Vol. 35 (2004) 32-39”.