Stagecoach will be running a Sunday service on the forthcoming August Bank Holiday Monday. Nothing unusual in that, of course. But do remember that new timetables will be in operation. For the most part the changes to the Sunday timetable are only minor. But that's not the case if you use Cambridge North, live in Orchard Park, or are accustomed to using the Godmanchester services (you'd be better to consider the Whippet X3 in future for this last if you want to travel into Cambridge).
Whippet will also be running a Sunday service, with the U continuing to extend to/from the Biomedical Campus (but note that the Outpatients stop remains suspended).