A coach company’s licences could be suspended if it cannot provide information about drivers’ hours and service reliability.

The Heritage group, which runs four companies in Sussex, was given another ten days to come up with the details after a protracted investigation by the Driver and Vehicle Standards Agency (DVSA).

The investigation led to a public inquiry by the Traffic Commissioner in Eastbourne on Tuesday, where Heritage also faced questions over vehicle safety and the legitimacy of a “party bus”.

Heritage Group, run partly by Christopher Stepe and Russell Stepe, owns Round And About, Sussex Commercial Services, Coach Hire Coaches and City Of Chichester Coaches, which trades as both TheSussexBus.com and Crawley Reds.

Traffic Commissioner Nicholas Denton warned the pair that their licences could be suspended if they fail to hand over “stuff they should have readily available in [their] office” by October 10.

He said: “If you don’t meet these deadlines I may have to consider suspending one or more of your licences. If you don’t co-operate from now on I will take regulatory action against your licences.”

Issues were raised over the number 31 Sussex Bus route serving Bolnore, Haywards Heath, Uckfield and Heathfield, which was reported as running early, late or not at all on more than one occasion. The service is supplemented by the Government through a grant and the DVSA found it to have a 30% unsatisfactory service.

There were also safety concerns over other buses. One had a cracked windscreen and a fuel tank leak, while another, believed to be a school bus operating in Burgess Hill, had been driven for about 200km with a faulty accelerator.

The company claimed it was a complaint by one “heavy-booted” driver, before Mr Denton pointed out it had been logged by six drivers.

Mr Denton said: “If you have a vehicle as big as a bus that can either only crawl along or go full throttle, that is a problem and it’s slightly disconcerting that you are trying to belittle it.”

Philip Brown, the solicitor for Heritage Group, said afterwards: “The operator had the opportunity to present the facts relating to the circumstances surrounding the investigation and will be in a position to produce the documentation requested according to the timetable set by the Traffic Commissioner now that the dates required have been specified.”

The public inquiry will reconvene in late November.