In praise of … Mark Gatiss
National treasure status can surely not be far away for the writer of SherlockEvery so often, always in the nicest possible way, a good actor's career enjoys a breakthrough. Suddenly the work flows in and the actor never seems to be off the screen or stage. Last year, it was true of Broadchurch star Olivia Colman. In 2014, although it is early days, the same thing is happening to Mark Gatiss. Not content with writing…