The Prince of Wales spoke to construction workers about their mental health during their lunch break when he visited a major building site in the capital. William chatted to a group of carpenters and a supervisor when he visited their on-site canteen after touring the development in a hard-hat, high visibility jacket and protective glasses. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn