What is "costock"

Costock is a village and civil parish in the Rushcliffe district of Nottinghamshire, England. The population of the civil parish taken at the 2011 Census was 621. Although Costock is in Nottinghamshire, its closest town and the postal address are Loughborough, across the border in Leicestershire. Costock lies next to the A60 (Nottingham–Loughborough) road.