PETER BROOK has been fascinating and bewildering audiences for over 35 years, as a director of theatre, film, television and opera. Since his highly acclaimed production of A Midsummer Night's Dream in 1970, he has devoted his energies to setting up and experimenting with his International Centre of Theatre Research at the tiny Bouffes du Nord Theatre in Paris. In trying to discover a form that's totally new, and in constantly challenging accepted theatre conventions, his philosophy is: ' Never stop. It's a golden rule -one always stops as soon as something is about to happen.'