First have revealed the details of changes to their Southampton routes from 26th February. See the details here.
There are generally minor timing changes affecting all routes other than the 8, but there are a couple of routing changes too:
The 1 (City Centre-Adanac Park) will use Olive Road instead of Aldermoor Avenue.
The 7 (City Centre-Townhill Park) will run the other way round the terminus loop in Midanbury and Townhill Park, which could backfire as those who forget to use the stops on the other side of the road can still get Bluestar 16 into town from the stops the 7 uses currently:
All of the new timetables are already on Traveline.
Further to the mention in the previous post about the Wiltshire Day Rover ticket, here's a summary of how you can get from Southampton to Oxford by bus for £8.50:
National Express, Megabus or Cross Country Trains to get back.