Finchley and Golders Green
It has the largest Jewish population of any constituency in the UK. Which may explain why Finchley and Golders Green has become a key target seat for the Lib Dems and their candidate Luciana Berger.
The former Labour MP walked away from her party earlier this year over its response to antisemitism and now she's hoping she will be able to unseat the Conservatives with her new party.
Chloe Keedy has spent the day with the three candidates vying for the role.
After being expelled from the Conservative Party for rebelling over Brexit, Dominic Grieve is going it alone. He's standing as an independent in Beaconsfield, the constituency he has represented as a Tory since 1997.
But can he persuade voters to go for personality over party? Our Political Correspondent Simon Harris spent the day speaking to all the main candidates.
Famed as the start point for the boat race, Putney in south west London could be a key battleground in the fight for Number 10.
In the last election, Conservative Justine Greening won by just 1,500 votes. Now she has stepped down, the opposition parties believe it is all to play for.
There are many reasons people choose to go into politics, and for some it is very personal.
Five years ago Paul Kohler was battered in his home when burglars broke in. In his recovery, he started campaigning locally, and is now standing to be an MP in Wimbledon.
He is looking to beat Conservative Stephen Hammond who has been doing the job since 2005.
Labour too, think they have a chance in Wimbledon.
Cities of London and Westminster
It is an election called over Brexit and in the Cities of Westminster and London that issue will dominate voters' decisions.
Former Labour MP Chuka Umunna has left his safe seat in Streatham and switched sides to the Lib Dems, hoping to capitalise on the remain vote.
But can he persuade enough people to overcome the Tories' majority?