The Sheerness Line connects Sheerness on the Isle of Sheppey in Kent with Sittingbourne on the mainland, and with the Chatham Main Line for trains to London and elsewhere in Kent. It opened on 19 July 1860.
The connection to Sittingbourne faces away from London, and most trains on the line run as shuttles between the station and Sheerness - there are, however, a few through trains which run directly between Newington station and Kemsley.
Swale station is earmarked for closure. It currently receives an off-peak service of a train every thirty minutes in either direction, but this is due to be reduced to either one train a week or the station to be closed altogether.