Hertsmere is a constituency in Hertfordshire, England, represented in the House of Commons since 2015 by Oliver Dowden. Constituency profile Just beyond the North-Western boundary of Greater London and with fast railway links into the capital, Hertsmere is a Parliamentary constituency in the Home Counties. The constituency is in the London Commuter Belt, largely inside London's orbital motorway the M25 and within the London green belt, in the South-West of Hertfordshire. Political consultancy Electoral Calculus classifies the constituency's population as broadly Conservative 'kind yuppies'. Hertsmere has the third highest Jewish population of any UK Parliamentary constituency. According to the census for England and Wales, the population of the Hertsmere local authority area (which presently corresponds to the area of the Parliamentary constituency) has increased by 7.8%, from around 100,000 in 2011 to 107,800 in 2021. This is higher than the overall increase for England (6.6%), where the population grew by nearly 3.5 million to 56,489,800, but slightly lower than the increase for the East of England region that Hertsmere belongs to (8.3%). The fastest growing age group in Hertsmere is the over-65s, which has increased since 2011 by 17.6%, close to the overall rate of growth for this age group in England (20.1%). Parts of the constituency are among the most prosperous in Britain but 2015 data from the English Multiple deprivation index for the Borough of Hertsmere shows widely varying levels of deprivation, with overall deprivation levels - on a scale from 1 (the most deprived) to 32,844 (the least deprived) - ranging from 3,049 for Borehamwood Cowley Hill, the most deprived area in Hertfordshire and in the top 10% most deprived nationally, to 32,695 for Bushey Heath, in the top 1% least deprived. The constituency of Hertsmere has returned a Conservative Member of Parliament at every general election since its creation and has been a safe seat almost throughout, with majorities ranging from 3,075 in 1997 (the election in which Labour won 418 Parliamentary seats, the largest number ever held by a single party) to 21,313 in 2019 (when the Conservative Party won 317 seats and a Parliamentary majority of 85). A close result for second place occurred in 2010, with only 661 votes separating the Labour Party and Liberal Democrat candidates. In the history of the constituency the Liberal Democrat vote share has fallen substantially, from a quarter of the vote and second place ahead of Labour