Christmas shoppers are being warned to check before they travel because of industrial action by bus drivers. All 600 Trent drivers in Nottinghamshire, Derbyshire and Leicestershire are striking in support of a pay claim.
The workers, who are represented by the Transport and General Workers Union, say they will strike on the three Saturdays leading up to Christmas after the outcome of a postal ballot.
The company says there will be no further talks with the union while there is a threat of industrial action.
Executives also say that an above-inflation award averaging 4.2% has just been paid to drivers.
Although Trent buses are striking Barton buses remain in service.
Strike action is also expected on Saturday 13 and 20 December.