News and views of talented Canadians who have found rewarding places in entertainment or the arts in London and Paris. Among them are Beverly Baxter, now a baronet and MP, who says London is an invasion city (first the Romans, now the Canadians), and Mordecai Richler, a novelist who feels England offers the young writer more chance of a living than he might get back home. Then there are the Bradens, successful and happy, who, given the proper inducement, would pack a bag for home tomorrow.