Rangers and Celtic fans have been issued a warning ahead of the Old Firm this weekend.

The match is set to take place at Celtic Park in Glasgow's East End on Sunday, September 1, at 12.30pm.

Ahead of it, ScotRail has issued travel advice for footy fans ahead of 'another busy weekend'.

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The train operator is encouraging customers travelling over the weekend to 'plan ahead', with football action in Glasgow and the Largs Viking Festival getting underway.

ScotRail has issued the travel advice due to fewer services operating because of the temporary timetable which is currently in place.

However, to support travel to and from the events, the rail firm is adding as many carriages as possible to services.

The Largs Viking Festival takes place between Saturday, August 31, and Sunday, September 8, at the Largs Promenade where people can experience life in a 13th Century Norse-Gael village. 

ScotRail has confirmed it will add additional carriages, where possible, to trains between Glasgow Central and Largs. 

The travel company says queuing systems will be in place at key stations along the route, so customers should allow extra time for their journey.

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Phil Campbell, ScotRail Customer Operations Director, said: “With another busy weekend for travel across Scotland’s Railway ahead, we’ll be doing everything we can to help customers get to where they need to be. 

“Trains are expected to be busier than usual with the Largs Viking Festival getting underway, as well as various football matches. To support these events, we’ll be adding extra carriage where we can.  

“However, customers are reminded that with the temporary timetable currently in place, there are fewer services than normal in operation.  

“That’s why we’re encouraging everyone to allow extra time for travel and to check their journey in advance on the ScotRail app or website. 

“Buying return tickets before you board using our mTicket system on our mobile app will help your journey run smoothly.”  

A spokesperson for ScotRail added: "As with previous weeks, Sunday’s timetable will be significantly reduced and customers are advised to check the ScotRail app or website to get the latest information.

"This will be updated by Friday, 30 August.  

"Extra staff will be on hand to make sure everything goes smoothly, and the train operator is also reminding everyone that the carrying and consumption of alcohol is prohibited on ScotRail trains and in ScotRail stations. "