Passengers are being warned that the upcoming rail strikes will leave some areas with no services, which is due to start on 30 September until 4 October.
The rail strikes will also coincide with the Tory annual conference as members of Aslef are to walk out over a bitter dispute of pay and conditions.
The strikes will affect 15 train companies and services will start later and will end earlier and the Rail Delivery Group (RDG) said operators will run as many trains as possible.
They warned that there will be regional variations of some services, the RDG advised.
The RDG said: “The rail industry is working hard to keep trains running despite the union leaders’ decision to reject an offer which would give their members an 8% pay rise over two years, taking average salaries for train drivers up from nearly £60,000 a year to almost £65,000 a year for, on average, a four-day week.”
A spokesperson for the RDG said: “We want to resolve this dispute and are acutely aware of the damaging impact it’s having on our passengers, our people and the long-term sustainability of the industry itself.
“We apologise to our customers for the unnecessary disruption to their journeys caused by the Aslef leadership.
“The offer to Aslef, which would take average driver salaries from £60,000 to £65,000 for a four-day week, remains on the table, and we are always open to constructive dialogue.
“However, at a time when industry is losing £10 million a day post-Covid, its leadership must recognise the need to make changes to how the industry is run, to both fund any rise and crucially, so we can give our passengers more reliable train services, particularly on Sundays.”