I think most people accept YouGov polls to be completely impartial, that’s why I used them. I’m saying that I would wager a survey by them would give the same results.
But that’s not a sensible comparison, as TSSA are considered moderate across the whole TUM spectrum. You’ve picked 2 political parties on the (one on the extreme far) right.
The average wage of a Tube Driver is 52k. I’d say, given that, Bob Crow is fairly powerful, and doesn’t need to do an awful lot of scaremongering to extract his members subs.
Of course they can change their mind, but if you play politics with people’s livelihoods, you always run this risk. And besides, as far as I can see the strike threat was to get LU back round the table, not to necessarily stop the office closures (although that may come to pass)