Yellow Buses' network is completely reworked in Bournemouth and Poole from 8th April, with every route changing back to conventional route numbers. See the new timetables here. It looks like More are taking on the R4 and R5 routes, which are being abandoned by Yellow.
Stagecoach have new timetables on most of their Winchester routes from 25th March. See full details and the new timetables here.
Also on 25th March we have a timetable change to First X54 (Poole-Weymouth) and their entire Weymouth network.
Plus, First M1 (Southampton-Marwell Zoo) relaunches for the summer season from 30th March. First don't think you're interested in the timetable yet, as it isn't on their website, but you can see it on Traveline here.
See a summary of all changes on the way here.
