LONDON — Southern Railways train drivers and British Airways cabin crew members have walked off the job, touching off fresh disruption for travellers the day after a subway strike caused misery across London.

Rail passengers in southern England faced the most disruption, with only a handful of trains operating in the latest episode of a long-running dispute over safety. Hundreds of thousands of people were unable to get to work.

Unite union members at BA started a 48-hour strike in a dispute over pay. BA says 22 flights in and out of Heathrow out of some 800 in all would be cancelled Tuesday.

The strikes came a day after subway workers walked off the job, crippling central London as unions increasingly show a willingness to strike in disputes.