A county constituency in East of England, England.
Geographic code: E14001284
Notional elections
Constituency statistics
Office of National Statistics dashboards
Constituency area formation
Hertsmere (start date dependent on next dissolution) was formed from:
- Part of Hertsmere (13 April 2010 - )
- Part of Broxbourne (13 April 2010 - )
- Part of Welwyn Hatfield (13 April 2010 - )