Whilst I haven't seen a formal announcement anywhere, using a combination of 'Notices and Proceedings' from the Office of the Traffic Commissioner, as well as bustimes.org, it seems Holderness Area Rural Transport (HART) service 243 between Withernsea and Beverley was revised last Tuesday (21st February). The service was introduced last September.
The service now appears to omit Flinton, Aldbrough and Withernwick, operating between Sproatley and Skirlaugh via New Ellerby instead. This revised route has reduced the end-to-end journey time from 90 to 60 minutes, with the service continuing to operate on Tuesdays only, departing from Withernsea at 0930. However the return from Beverley now departs at 1330 rather than 1315, giving passengers 3 hours rather than 2 hours 15 minutes in the East Riding County Town.