Quite why Oh T'ae-Sok has suddenly decided that London might be an appropriate place to stage one of his plays he never manages to explain. The sprightly 60-year-old is regarded as one of the most important dramatists and directors working in Asia today, but beyond a brief, highly successful foray onto Broadway in the 1970s, his focus has been absolutely local. His work is part of a forceful attempt to rebuild a proud indigenous culture after the devastation of years of occupation, war and dictatorship that throttled Korea for the first two-thirds of the last century. This week, for the first time, one of his plays is about to be produced in London, at the Union Chapel studio in Islington, and he has decided to come over with his own company to perform here in November.