The Revolving Door of LifeFor seven year old Bertie Pollock, life in Edinburgh's most celebrated fictional street has just got immeasurably better. The enforced absence of his endlessly pushy mother Irenecurrently consciousness raising in a Bedouin harem (don't ask)has manifold and immediate blessings: no psychotherapy, no Italian lessons, and no yoga classes. Bliss. For Scotland Street's grown ups, life throws up some new dilemmas. Matthew makes a discovery that could make