Unite says workers will walk out two more days each week after a rejected pay offer.
Strike action ends as unions and employers agree a new pay deal for bus drivers in Doncaster.
Drivers who supply groceries to Morrisons supermarkets are being balloted for strike action.
Employees are heading to the picket line after the company's CEO received a bonus of £45.4m.
Around 300 Stagecoach drivers based at Bow garage will strike for 24 hours from 05:00 BST Friday.
Unite says Go North West pays its drivers less than other Bee Network operators in Greater Manchester.
Tomorrow is the first of 10 more days of action scheduled to take place this month, says a union.
Workers at Amcor in Cramlington are walking out every Monday for 11 months over a pay dispute.
Unite says workers will vote on industrial action in a pay dispute with firms based at Aberdeen, Edinburgh and Glasgow airports.
