in 1983 to less than half that and third place in 2019. In 2015 the party fell to fourth place. The other parties represented in the constituency since it was created are the UK Independence Party (UKIP), whose vote peaked at 6,383 in 2015, The Green Party (1,653 in 2019), the British National Party (1,397 in 2010), the Referendum Party (1,703 in 1997), Socialist Labour Party (518 in 2005) and the Natural Law Party (191 in 1997). In 1983, Ronald Parkinson, who stood as an Independent Communist, polled 1,116 votes. Boundaries and composition 1983–1997: The Borough of Hertsmere, and the City of St Albans ward of London Colney. The New County Constituency was formed largely from the bulk of the abolished County Constituency of South Hertfordshire. Also included is the area comprising the former Urban District of Bushey, transferred from South West Hertfordshire. 1997–present: The Borough of Hertsmere. Since 1997 the constituency is coterminous with the borough of Hertsmere, in southern Hertfordshire (before then it had also included the City of St Albans ward of London Colney, which was transferred to the St Albans constituency). Hertsmere consists of the major towns and villages of Bushey, Radlett, Potters Bar and Borehamwood, elevated settlements above the headwaters of the River Colne which forms much of the northern border. Bushey borders Watford and the London Borough of Harrow to the west and south west, while Potters Bar borders Barnet and Broxbourne on the east. Borehamwood is just south-east of the centre, the largest town in the constituency — in the north and centre is Radlett, separated by two large villages and farms from St Albans to the north. Following their review of parliamentary representation in Hertfordshire, the Boundary Commission recommended no changes to constituency boundaries for the 2010 general election. The seat has electoral wards: Aldenham East, Aldenham West, Borehamwood Brookmeadow, Borehamwood Cowley Hill, Borehamwood Hillside, Borehamwood Kenilworth, Bushey Heath, Bushey North, Bushey Park, Bushey St James, Elstree, Potters Bar Furzefield, Potters Bar Oakmere, Potters Bar Parkfield, Shenley. In 2021 the Boundary Commission for England, as part of the 2023 Periodic Review of Westminster constituencies, published draft changes to constituency boundaries which are planned to come into force in 2023. To bring the population of the constituency within 5% of the new ‘electoral quota’ of 73,393, the commission proposed that the borough ward of Bushey North, currently in the Hertsmere constituency, join the