Tube passengers are being warned of disruption to services because of strikes by drivers.Members of Aslef will walk out on April 8 and May 4 in a dispute over terms and conditions.Transport for London (TfL) urged people to check before travelling.On Monday April 8 severe disruption is expected, with little or no service on some lines, and Tube services will start later than normal on Tuesday April 9.There will also be severe disruption on Saturday May 4, with little or no service expected on som

Tube passengers are being warned of disruption to services because of strikes by drivers.Members of Aslef will walk out on April 8 and May 4 in a dispute over terms and conditions.Transport for London (TfL) urged people to check before travelling.On Monday April 8 severe disruption is expected, with little or no service on some lines, and Tube services will start later than normal on Tuesday April 9.There will also be severe disruption on Saturday May 4, with little or no service expected on some lines, and Tube services will start later than normal on Sunday May 5.