In its current form (post-2024 boundary changes), the seat covers thenew town of Hemel Hempstead which is a significant employment centre, as well as a rural area of theChilterns to the south-west, including the villages ofBovingdon andFlaunden. Residents are slightly wealthier than the UK average.[3]
Harpenden was transferred back to St Albans in 1974 and the constituency was temporarily abolished from 1983 to 1997 during which time it was replaced byWest Hertfordshire.
The Rural Districts of Berkhamsted and Hemel Hempstead.[6]
Harpenden and the part of the parishes ofHarpenden Rural andRedbourn were transferred back to St Albans.
The constituency was abolished for the1983 general election. Berkhamsted and the area to the south of Hemel Hempstead, includingKings Langley, was transferred to South West Hertfordshire. The remainder, including Hemel Hempstead and Tring, formed the new constituency ofWest Hertfordshire.
The District of Dacorum wards of Adeyfield East, Adeyfield West, Ashridge, Bennetts End, Boxmoor, Central, Chaulden, Crabtree, Cupid Green, Flamstead and Markyate, Gadebridge, Grove Hill, Highfield, Kings Langley, Leverstock Green, Nash Mills, South, and Warners End.[7]
Re-established for the1997 general election from the bulk of the abolished County Constituency of West Hertfordshire (excluding Tring). Kings Langley transferred back from South West Hertfordshire.
The District of Dacorum wards of Adeyfield East, Adeyfield West, Apsley, Ashridge, Bennetts End, Boxmoor, Chaulden and Shrubhill, Corner Hall, Gadebridge, Grove Hill, Hemel Hempstead Central, Highfield and St Paul's, Kings Langley, Leverstock Green, Nash Mills, Warners End, Watling, and Woodhall.[8]
Minor loss to South West Hertfordshire following revision of local authority wards.
The District of Dacorum wards of: Adeyfield East; Adeyfield West; Apsley and Corner Hall; Bennetts End; Bovingdon, Flaunden and Chipperfield; Boxmoor; Chaulden and Warners End; Gadebridge; Grovehill; Hemel Hempstead Town; Highfield; Leverstock Green; Nash Mills; Woodhall Farm.[9]
Moderate changes, withKings Langley being transferred toSouth West Hertfordshire, in exchange for the rural Bovingdon, Flaunden and Chipperfield ward. The rural Ashridge and Watling wards to the north were moved to the newly created seat ofHarpenden and Berkhamsted.
General Election 1939–40:Another general election was required to take place before the end of 1940. The political parties had been making preparations for an election to take place from 1939 and by the end of this year, the following candidates had been selected;
Craig, F. W. S. (1983) [1969].British parliamentary election results 1918-1949 (3rd ed.). Chichester: Parliamentary Research Services.ISBN0-900178-06-X.