Vote 2017: Election day live: voters head to the polls in Watford, St Albans and Borehamwood
- Huge shock as exit poll predicts hung parliament
- Conservatives would be the largest party but would not have an overall majority
- Extra security has been stepped up at the counts tonight
- The Tories have strong majorities across the county
- Let us know if you've voted by tweeting us @Observer_owl, or reply in the comments below
- We have reporters in Watford, Hertsmere and St Albans
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