So on the MML the main change is the weekends going back to 4tph from Bedford. Pre-May 2018, we generally did get 4tph to London on Saturdays but on Sundays if there were engineering works between Three Bridges and Brighton or near Sevenoaks, we'd only get 2tph to London. So I have had a look at the initial services. The details are only available until June 23rd at present (when will we get back to 12 weeks in advance I wonder?).
Of the 5 Saturdays with the new timetable, there's the full service 2 weeks, one lot of 2tph to St Pancras only and 2 lots of buses between Bedford and Luton.
Of the 6 Sundays, there's one lot of Full Service, one Full service but only to Three Bridges, 2 lots of 2tph to St Pancras only and 2 lots of buses to Luton.
So for stations north of Luton, I make that an average of 2tph to St Pancras on both Saturdays and Sundays.
On the plus side, the full service but only to Three Bridges on Sunday June 2nd, is probably better than we would have got late 2017/early 2018.