I think the government has enough trouble clinging onto power. They have no time to be tinkering around with little things like running the country. Ruining it maybe.I'm fairly sure that calling 52 weeks of strikes will prompt retaliation from Arriva in the form of revised T's and C's for staff and/or the government deciding to further tighten legislation.
As for Arriva. What are they going to do? At the moment they don't have a single train capable of DCO. They have inherited staff on three different forms of terms and conditions. All Arriva can do is hope the government keeps on bankrolling them, and all the government can do whilst it messes with Brexit is keep doing so.
Watch out for Sunday 23rd Dec. A lot of Sunday jobs may be uncovered.