Rail unions set new strike dates on London underground

London is set for more transport chaos in January and February after the RMT and ASLEF train drivers' unions said they had set three more 24-hour strikes on the capital's underground rail network in a long-running dispute over planned night working. The unions are unhappy with the pay and terms offered by London Underground (LU) to implement a 24-hour service at weekends on some lines. London's extensive underground system handles up to 4 million passengers a day and previous strikes have caused