The Hayes Line - part of which was the Mid-Kent Railway - is the name given to the railway service operated by South Eastern Trains between Charing Cross or Cannon Street and Hayes in the London Borough of Bromley.

Description of the route

• London Bridge - North Kent Junction, Bermondsey: The pioneer London & Greenwich Railway opened their line on 8 February 1836. This section is built on a brick viaduct
  • Before London Bridge, services commence at either Charing Cross via Waterloo East, or Cannon Street.
• North Kent Junction - Lewisham: opened 30 July 1849 as the North Kent Railway, now called the North Kent line. Most of the railway here is in cutting with the four tracks passing through St Johns railway station: the two northernmost leading into Lewisham station.
• Lewisham - New Beckenham: opened 1 January 1857 as the Mid-Kent line. This opening created a junction at Lewisham.
• New Beckenham - Elmers End: opened on 1 April 1864 as part of an extension of the Mid-Kent line to Addiscombe
• Elmers End - Hayes: this section was built by the West Wickham & Hayes Railway, but was sold to the South Eastern Railway on opening day, 29 May 1882

The Strategic Rail Authority has opened discussions on entirely replacing the Charing Cross services with Cannon Street services (date?).