25 JUNE 1988, Page 21

Baker Street irregulars

THE recurrent nature of trains on the Circle Line is among the London Under- ground's longer-lasting difficulties, as its management explained last week to Domi- nic Lawson. Not only the Circle Line. As W. S. Gilbert wrote to the directors of the Metropolitan Railway: 'Saturday morn- ings, though occurring at frequent and well-regulated intervals, always seem to take this railway by surprise.'