Vic, the LNER strike is part of a very long-standing dispute which is nothing to do with pay.
Basically, workplace relations between staff and managers at the company (which is Government-owned, by the way) has completely broken down largely due the company reneging on previously-agreed changes to working practices. Yes, there's fault on both sides, and some of the language used by the union (i.e. referring to "scabbing") is abhorrent and takes you right back to the Miner's Strikes, and yes, it's a terrible look and a complete gift to the likes of the Daily Mail, but it has to be said that some of the "Terms and Conditions" that railway employees have to work under are simply draconian. I wouldn't take that sort of a job, even for £69k p.a., and I doubt most people would either.
It's similar with the Border Force action at Heathrow. Management have imposed changes to shift patterns and working hours and just like on the railways, your life isn't your own. This is the nub of both disputes. Remember Tennessee Ernie Ford's "Sixteen Tons"?
St. Peter, don't you call me 'cause I can't go
I owe my soul to the company store
https://www.youtube.com/watch?v=S1980WfKC0o