Here is a list of all the counties buses, you will need to read down the list the find the route you need to get to Kettering and each one has a timetable you can check.

www.northamptonshire.gov.uk/en/councilservices/Transport/journey-planning/pubtrans/Pages/allbusTimetables2.aspx

Trains - easy to use site to find details of times

www.uktraintimes.com/timetable-corby-kettering.html

Taxis

www.thomsonlocal.com/Taxis/in/Kettering/