SCOTLAND'S largest bus-operating company has been plunged into crisis after the head of its Glasgow division went on indefinite gardening leave in a suspected row over service cuts.

Ronnie Park, managing director of First Glasgow, which runs bus services in Greater Glasgow, is understood to be taking a leave of absence. It is unclear if or when he will return to the post. A senior manager from First's Aberdeen division is understood to have been appointed temporarily in his place.

Mr Park took the post in 2010 after serving for three and a half years as operations director and deputy managing director. It is understood he was unhappy about deep cuts that First's senior management expected him to implement.

One industry source told The Herald there were fears the company would now bring in a "heavy-hitter" willing to slash jobs and services.

The insider said: "[Ronnie Park has] basically been put out to pasture. It's been a long time coming. He's not exactly happy about having to make the cuts that management want him to, but the concern is now that they'll get in some kind of heavy-hitter willing to get rid of the routes that aren't making as much money as they'd like.

"You've got to think that it's not good news around the corner."

It follows warnings that bus firms could be forced out of business by the combined pressures of providing the Concessionary Travel Scheme, which allows over-60s and the disabled to travel by bus for free, and the ballooning cost of fuel and other overheads.

In January, it emerged there was an estimated £15 million shortfall in the amount of public money available to reimburse operators for running the flagship scheme. Ralph Roberts, managing director of McGill's, warned that bus companies would be forced to cut services to save money. Yet ministers have fought off suggestions that access to it should be restricted.

A spokesman for First Group said: "Ronnie Park is taking some leave and operations are continuing as normal."