First have published a list of diversions for their services:
www.firstgroup.com/south-yorkshire/news-and-service-updates/current-issues/rotherham-interchange-service-disruptionDue to a fire in Rotherham Bus Station, all 'A' platforms have been closed until further notice.
In order to maintain punctuality and reliability for you, we've found it necessary to implement the following diversions from Tuesday 17 May, until further notice. We're extremely sorry for any disruption caused to you as a result.
Services 1, 1a, 2
From Rotherham Interchange buses will run via Corporation Street, Westgate, Alma Road, Hollowgate and Wellgate. Please note that Doncaster Gate and two stops on Wellgate will not be served. Passengers can board on Corporation Street and Westgate.
Services 7, 8
Journeys towards Rotherham will run via Main Street, Westgate, Alma Road, Moorgate Road, Mansfield Road, Wellgate, Howard Street, Wharncliffe Street. Some buses will terminate at Rotherham College if they then change to another service number.
Journeys from Rotherham are unchanged.
Service 10
Buses towards Rotherham will terminate on Corporation Street.
Buses from Rotherham will run via Corporation Street, College Road, Centenary Way, Main Street, Westgate, Alma Road, Moorgate Road. Please note that Doncaster Gate and Wellgate will not be served.
Services 11, 12
Buses will START from Rotherham College and run via Howard Street, Drummond Street, Centenary Way, St Anns Road, Doncaster Road.
Buses towards Rotherham will run via Doncaster Road, Doncaster Gate and Howard Street.
Service 13
Buses from Rotherham will run via Corporation Street, College Road, Centenary Way, Main Street, Westgate, Alma Road, Moorgate Road. Please note that Doncaster Gate and Wellgate will not be served.
Buses towards Rotherham will terminate on Corporation Street.
Service 14
Buses will START from Rotherham College and run via Howard Street, Drummond Street, Centenary Way, Drummond Street, Wharncliffe Street.
Service 15
Buses will START from Rotherham College and run via Howard Street, Drummond Street, Centenary Way, Drummond Street, Wharncliffe Street.
Services 22a and 22c
Buses from Rotherham will depart from B platform - stand to be determined by Interchange Staff. From Interchange via College Road, Centenary Way.
Buses towards Rotherham, depending on the bus's next journey, may run via St Anns Road, Doncaster Road, Doncaster Gate and Howard Street to terminate at Rotherham College.
The 0823 Hospital journey will have to depart from B platform and operate via Corporation Street, Westgate and Alma Road.
Service 22m
Buses towards Rotherham will terminate on Corporation Street.
Buses from Rotherham will run via College Road, Centenary Way.
Services 27 and 29
Buses towards Rotherham will terminate on Corporation Street.
Buses from Rotherham will run via Corporation Street, College Road, Centenary Way, Main Street, Westgate, Alma Road, Moorgate Road. Please note that Doncaster Gate and Wellgate will not be served.
Service 34
Buses will depart from Stand B8 and run via Corporation Street, Westgate, Alma Road, Hollowgate and Wellgate.
Please note that Doncaster Gate and two stops on Wellgate will not be served. Passengers can board on Corporation Street and Westgate.
Service 37
Buses from Rotherham will START from Rotherham College and run via Howard Street, Drummond Street, Centenary Way, St Anns Road, Doncaster Road.
Buses towards Rotherham will run via Doncaster Road, Doncaster Gate and Howard Street.
Services 39 and 41
Buses will continue to depart from stand B10 but delays are expected.
Services 40 and 42
Buses will terminate opposite Rotherham Railway Station outside the old "Bullseye" store. From there via Greasborough Street, Centenary Way.
Service 66
Buses will continue to depart from stand B6 but delays are expected.
Service 69
Buses towards Rotherham will terminate on Corporation Street.
Buses from Rotherham will run via Corporation Street, College Road, Centenary Way, Main Street, Westgate.
Services 71, 72, 72a and 73
Buses towards Rotherham will terminate on Corporation Street.
Buses from Rotherham will run via Corporation Street, College Road, Centenary Way, Main Street, Westgate.
Service 73a
Buses towards Rotherham will terminate on Corporation Street.
Buses from Rotherham will run via Corporation Street, College Road, Centenary Way, Main Street, Westgate, Alma Road, Moorgate Road. Please note that Doncaster Gate and Wellgate will not be served.
Service X78
Towards Sheffield the route is unchanged but please expect delays.
Towards Doncaster buses will use the stop opposite railway station. From there buses will run via Greasborough Street and Centenary Way.