There's one NATS bus from Swanwick train station leaving the station at 830am getting to CTC for 840am. There is also an option to get the bus from the airport Parkway station at either 750 or 810am, both journeys taking 20 minutes. There is just one bus going back from CTC to Swanwick, leaves CTC at 1730 and takes 10 minutes. There are several options from CTC to Parkway starting at 1545 and the last is 1815.