National Union of Rail, Maritime and Transport Workers (RMT) members employed by multiple Train Operating Companies have voted in favour of extending the mandate for industrial action.
https://www.rmt.org.uk/news/rmt-members-overwhelmingly-back-further-strike-action/
RDG response:
https://media.raildeliverygroup.com/news/rail-delivery-group-responds-to-the-latest-rmt-ballot
