Here are the details from the Stagecoach website:
"There are minor adjustments to morning peak hour departures to accommodate additional journeys between St. Ives and Cambridge. There are also changes to journeys in the evening peak to accommodate additional journeys between Cambridge and St Ives. There are additional minor changes to evening peak journeys from St. Ives Hill Rise, Marley Road and Ramsey Road towards St Ives Town Centre. Route A departures on Sundays have been re-named to Route D and will serve Milton Road stops. The Route A to Buckden will now depart St. Ives Bus Station at 18:08 and will serve stops 12 minutes earlier throughout the journey. The 1450 from Huntingdon to Peterborough (M-F) journey will now depart 5 minutes later and will serve stops 5 minutes later throughout."The revised timetable is also available for download from Stagecoach.