Theatre review: Equus / Gielgud Theatre, London
Gielgud Theatre, LondonForget all the prurient press speculation about Harry Potter's private parts. The revelation of this revival is that Daniel Radcliffe really can act, proving that his screen appearances as JK Rowling's boy-hero are no flash in the magic pan. His performance also helps to camouflage the fact Peter Shaffer's celebrated ritual drama sometimes betrays its early 1970s origins.Radcliffe plays 17-year…