A by-thirds 2015 Castle Point Borough Council election took place on 7 May 2015 to elect 14 of the 41 members of Castle Point Borough Council in England as part of the English local elections which coincided with the 2015 General Election. The result produced a Conservative-affiliated councillor gain and so a majority of two councillors.
References
Castle Point Borough Council election, 2015 Wikipedia(Text) CC BY-SA