(Bloomberg) -- The UK is about to endure more train disruptions at one of the busiest travel times of the year, following renewed strike calls on rail workers.

Over 40,000 members of the National Union of Rail, Maritime and Transport Workers (RMT) plan to take weeks-long industrial action in December, affecting train operations across the country in the run-up to Christmas and into the new year. The union said track owner Network Rail and train companies failed to offer new deals to settle the ongoing dispute over pay and jobs. The latest stalemate came after canceling a 3-walkout in November.

The upcoming action is expected to cause different levels of service disruptions. Here’s a list of the confirmed train strike dates and the affected operators.

Friday-Saturday, December 2-3

  • Unite the Union members on EMR are planning a 48-hour strike.
  • Which train company is affected? East Midlands Railway.

Sunday-Monday, December 11-12

  • Planned strikes by members of RMT union on Avanti West Coast were canceled.

Tuesday-Wednesday, December 13-14

  • RMT members on Network Rail and 14 operators will take part in a 48-hour strike nationwide. Members of Transport Salaried Staffs’ Association (TSSA) union on Avanti West Coast will also walk out on the same days.
  • Which train companies are affected? Avanti West Coast, C2C, Chiltern Railways, Cross Country Trains, East Midlands Railway, Great Western Railway, Greater Anglia, GTR (Southern, Thameslink, Great Northern and Gatwick Express), LNER, Northern Trains, South Western Railway, Southeastern, Transpennine Express, and West Midlands Trains (West Midlands Railway and London Northwestern Railway).

Thursday, December 15

  • Engineers on GWR, represented by the Unite labor group, will take further strike action.
  • Which train company is affected? Great Western Railway.

Friday-Saturday, December 16-17

  • Like earlier in the week, RMT members on Network Rail and 14 operators will take part in another 48-hour strike nationwide. TSSA members on some of the companies will join the strike.
  • Which train companies are affected? Avanti West Coast, C2C, Chiltern Railways, Cross Country Trains, East Midlands Railway, Great Western Railway, Greater Anglia, GTR (Southern, Thameslink, Great Northern and Gatwick Express), LNER, Northern Trains, South Western Railway, Southeastern, Transpennine Express, and West Midlands Trains (West Midlands Railway and London Northwestern Railway).

Friday-Saturday, December 23-24

  • Another 48-hour strike for members of Unite on EMR.
  • Which train company is affected? East Midlands Railway.

Saturday-Tuesday, December 24-27

  • Planned strikes by RMT members affecting engineering works at Network Rail, starting from 6 p.m. on Christmas Eve and ending at 6 a.m. on the Tuesday. No trains on Christmas Day and Boxing Day.

Monday-Tuesday, December 26-27

  • TSSA members on Cross Country will stage strike action from 9 p.m. on Boxing Day until 9 p.m. the following day.
  • Which train company is affected? Cross Country Trains.

Wednesday-Thursday, December 28-29

  • TSSA members on two operators will take part in 24-hour industrial action.
  • Which train companies are affected? Great Western Railway and West Midlands Trains (West Midlands Railway and London Northwestern Railway).

Further 48-hour RMT strikes are also planned for the beginning of January. TSSA has launched a re-ballot of thousands of its members in Network Rail and 10 train operating companies throughout December with results due before Christmas.

(Updates to add strike dates and cancelations)

©2022 Bloomberg L.P.