It's the same old English story. Appoint a bright spark to run a performing ensemble, to bring together the best ideas and artists in a scintillating season of drama, music and dance. Then shackle this paragon with the headache of managing a building on inadequate funds. Finally, burden him with a massive reconstruction project involving public and private funds and no end of architects and planning permissions - and what do you get? Surprise, surprise, another national theatre chief has resigned.