In 2001, Castle Point was characterised by skilled manual workers, commuters and the self-employed. Levels of home and car ownership in Hadleigh and Canvey were very high while social deprivation was relatively low.[3]
Of all the constituencies of the UK, it has one of the lowest levels of graduates.[4]
In all but one election, it has been won by a Conservative candidate, passing to Labour once, in the 1997 election. The former MP defeated in 1997, Bob Spink, regained the seat in 2001. He was re-elected in 2005 but subsequently resigned from the Conservative Party on 22 April 2008. Spink briefly joined UKIP,[5] but resigned the whip shortly afterwards and sat as an Independent MP.[6] In the 2010 election, Spink lost in Castle Point to the Conservative candidate, Rebecca Harris.
At the 2017 election Castle Point had the largest Conservative majority, at 42.2%, of any constituency to have elected a Labour MP in the 1997–2010 government. This was increased even further, to 60.1%, at the 2019 election. In 2024, the Conservative vote was more than halved with Reform UK taking over 30%, reducing the majority to just 8%.
Boundaries
1983–2024
Since its creation in 1983 until the 2024 general election, the Castle Point constituency was contiguous with the boundaries of the district council of the same name. The seat is one of only a very few that were unchanged by the boundary reviews which came into effect in 1997 and 2010, having seen population growth in line with the average seat (which is slightly larger), including development in the designated development plans of the Thames Gateway.