Train drivers will resume their strikes next month in a long-running row over pay, according to reports.
Drivers at 12 train operators are expected to walk out on 1 and 5 October, affecting travel to and from the Conservative party conference in Birmingham.
A planned strike by drivers on Thursday was called off as a mark of respect following the Queen’s death.
The drivers’ union Aslef said it would not be making a public comment until after the monarch’s funeral on Monday.
The new strikes will affect operators directly serving Brimingham, including Avanti West Coast, Chiltern, CrossCountry and West Midlands Trains, the report adds.
This may cause problems at Liz Truss’s first Tory conference as prime minister which is due to take place in Birmingham at The International Convention Centre in Broad St, Birmingham, from 2 to 5 October.
Other services which also face disruption, include Greater Anglia, Great Western Railway, Hull Trains, LNER, London Overground, Northern, Southeastern and TransPennine Express.
A rail industry source said: “It is quite frankly incredible and utterly disrespectful that the Aslef leadership has chosen to announce strike action to train operators today (Friday).
“This is a time when the entire rail family is working hard to support the hundreds of thousands of people who wish to pay their respects to Her Majesty the Queen during this time of national mourning.”
Industrial disputes in the rail industry and other sectors, including post and telecoms, have led to a summer of strikes, which are set to resume in the coming weeks.
Members of the Rail, Maritime and Transport (RMT) union were also due to walk out on September 15 and 17 in a long-running dispute over pay, jobs and conditions but this was postponed due to the Queen's death.
Members of the Communication Workers Union and The Transport Salaried Staffs Association (TSSA) also called off planned industrial action.
RMT general secretary Mick Lynch added: “RMT joins the whole nation in paying its respects to Queen Elizabeth.
“The planned railway strike action on September 15 and 17 is suspended.
“We express our deepest condolences to her family, friends and the country.”
CWU general secretary Dave Ward said: “Following the very sad news of the passing of the Queen and out of respect for her service to the country and her family, the union has decided to call off tomorrow’s planned strike action.”