Warkworth Castle, Northumberland: an important residence of the Percy family during the Middle Ages. The castle’s most notable feature is its ‘donjon’ (keep), which was constructed in the 1370s. The donjon was built according to an intelligent, compact design that makes excellent use of space – whilst also maintaining an aura of grandeur.
St Oswald's Church, Kirk Sandall, Doncaster, South Yorkshire. Parts of the church date back to Saxon time, but its most notable feature is the 16th-century Rokeby Chapel. More info: http://www.stoswaldskirksandall.co.uk/.