A new collection of plays from Willy Russell, one of Britain''s best-loved dramatists, features the smash hits <i>Blood Brothers</i>, <i>Our Day Out: The Musical</i> and <i>Shirley Valentine</i> as well as the previously unpublished<i> John, Paul, George, Ringo . . . and Bert</i>.<i>Blood Brothers</i>: A Liverpudlian <i>West Side Story</i>, this is the story of twin brothers separated at birth because their mother cannot afford to keep them both. ''One of those rare exceptions, where a show continues to pack a punch after many years on the road and in the West End''<i> - What''s On Stage</i>, (5 stars)<i>Our Day Out: The Musical</i>: Mrs Kay''s ''Progress Class'' are unleashed for a day''s coach trip to Conway Castle in Wales - in an exuberant celebration of the joys and agonies of growing up and being footloose, fourteen and free from school. ''One of those truly magical theatrical experiences that should very definitely not be missed'' - <i>Stage</i><i>Shirley Valentine</i>: The stor