I think a big factor that many are missing in the actual cost of this is that a permanent 10% reduction in service Monday-Friday accompanied by all of the staff who would have worked those services now having to work on Sunday instead would be enough to staff 50% of a weekday timetable on a Sunday without increasing the number of staff employed. Given that the demand from commuting is likely to remain significantly permanently below the levels experienced prior to 2020 and therefore many of the Covid reductions in service are likely to become permanent it may well be that the government believes the numbers of additional staff that would be required would cost less than the amount currently spent on overtime on Sundays (given that many TOCs are currently paying people to sit at home Monday to Friday and then paying again for Sunday when the people sat at home Monday to Friday could instead be made to work on Sunday without additional pay).
The tocs i work for are planning 100% service return from May, I don't know any plans for a permanent reduction I'm any services unless it's due to reduced staffing levels.
Can I ask which Tocs are paying staff to sit at home Monday to Friday??
I'm just wondering as I've had 6 days spare from home in over 2 years, other than them 6 days I have worked driving trains. There may be reduced services but there's been reduced staffing levels aswell with limited recruitment and training of traincrew which never gets taken into consideration it seems.
Regarding Sunday working it's the Tocs that want the services covered by overtime, many posters explain this in there experience working on the railways. Unions want more staff and more subscriptions but tocs want the work covered by overtime as it's by far the cheaper option for them. Less NI / less pension contributions as overtime is not pensionable/ less salaries / less uniform it's a win win for Tocs.