Hartley is located in United Kingdom (Kent, England) and time zone Europe/London.
Places nearby are Longfield, West Kingsdown and Swanscombe.
London is 37 km away, Birmingham is 213 km away and Sheffield is 261 km away as the crow flies.
Distances from Hartley to the most important cities in United Kingdom and the world.
51.3867300°
0.3036700°
1862 mining disaster in England
https://en.wikipedia.org/wiki/Hartley_Colliery_disaster