Britannia Waves the Rules review evokes harrowing life on the frontline
Royal Exchange, ManchesterDan Parr delivers a lung-busting performance as a working-class soldier adrift in AfghanistanAt least one theatre company advised Gareth Farr to put his debut play in a drawer and forget about it. Instead, Farr entered it for and subsequently won the Bruntwood prize in 2011.It's easy to see why theatres would be wary of producing Farr's drama it would frighten anybody. Britannia Waves the…