Another issue I have always had with committed sundays is , unless you have the same ratio of spare sundays as you have other days it will still always rely on volunteers as well because it is inevitable that from time to time people will be unable to take duty for their committed sundays , they could be off on the sick , taken off driving , finished late the previous day , dont sign the work etc etc . But if you do have the same ratio of spare , you might also be bringing people in spare, giving them no work . When they actually wanted the day off .
You asked “are drivers being paid for turning up at work when there are no trains to drive”, but that question makes no sense in the context of salaried employees who are entitled to be paid per their contract, irrespective of how little or much work they need to do; traincrew are not on zero hours contracts! Equally if there were no trains running due to (say) an engineering blockade, do you imagine traincrew booked to work that day lose a day’s pay?
The issue here in relation to Northern, as discussed many times before, appears to be a lack of appetite to either negotiate to bring Sundays into the week for relevant staff members, or to leave them outside but properly incentivise staff to attend work. It’s clear that this isn’t seen as a priority further up the chain, whether at a management or DfT level (or both) is less certain.
There is still an imbalance anyway with committed sundays . I have seen agreements at companies with committed sundays that entitle the company to cancel the sundays in advance for engineering work (think it was 14 days notice of any cancelled sunday turns ) - And of course where the sundays are committed overtime the links can also be changed with whatever the agreed posting period is and sundays removed .
But outside of this of course people should be paid , in the same way that traincrew still get paid any other day if they go into work but dont turn a wheel because on the day infastructure failure has prevented any of their work running . Of when you are spare/standby and dont turn a wheel cos everything is covered .
I remember a mate of mine working in the bus industry , and he got paid less when spare if he didnt turn a wheel . I can't imagine that going anywhere in the rail industry .