Blurb from Traveline:
'Swansea to Cardiff Shuttle100 will become part of the Greyhound network from 19th September 2010.
There will be some timetable changes after 0900 on weekdays and in the early evening. Sunday services will run two-hourly. Services will continue to call at existing stops and tickets can still be bought on board coaches, although there will be an additional online booking facility at http://www.greyhounduk.com
with some great bargain fares.'