National Express drivers are walking out for a fourth day in yet another week of strike disruption.
More than 3,000 members of Unite, employed by the coach operator in the West Midlands, are taking to the picket line.
A limited service, mainly serving major hospitals, will run after drivers ‘rejected an improved offer of a 14.3% pay increase’.
The strike started to affect services on Sunday night and has hit about 93% of the bus network.