Because all up and down services at that time call at both Newstead and Bulwell it isn't possible for the 0724 to call at both (and Hucknall) and make it to Kirkby Lane End Junction in time for the next Up service to occupy the single line. The current timetable on the Robin Hood Line sees trains passing in Newstead Loop and Bestwood Park Loop, something done away with for the sake of a clockface timetable.
Personally I'd have made the 0724 approx 0710 and dyked it into Bestwood Park Loop which would have enabled it to call at Hucknall.
On the current 0701 Nottingham to Worksop Hucknall is one of the busiest stations served (in normal times).
I think it’s going to cause real problems for people who work in Mansfield and have used the train for years to get to work. It’s not going to be much fun having to go as early as the 0640 train, also before 8 in the morning there are no buses from Hucknall to Mansfield that take less than 60 minutes to do the journey.
I would have thought not stopping at Bulwell would have been a better alternative as anyone travelling north could use the tram to Hucknall. Doubling back via Bulwell will be lots of additional expense and adds about £10 if you have to travel via Nottingham to reach Sheffield with a peak time ticket.
So annoying when the train is going to trundle through Hucknall at a slow speed yet will not stop.