Arthur Miller's 17th-century witch-hunt - an allegory for the anti-communist kind in McCarthyist America - is even eerier against a backdrop of the park's whispering trees. They give the rural setting a rare authenticity. On the press night they showered the stage in a blizzard of white seeds like a supernatural omen. Of the two Miller's currently on offer in London, All My Sons in the West End packs the more powerful punch. But you cannot fault artistic director Timothy Sheader's take here, or Patrick O'Kane's John Proctor who refuses to cave to authoritarian terror, just as Miller did. (Tel: 0844 826 4242)