Liberal Democrats are starting work on dismantling the Blue Wall following on from successful local elections in May.
Sarah Green produced a classic Liberal Democrat by-election win in the Chesham & Amersham constituency, overturning a Conservative majority of 16,223 to win with 56.7% of the vote, a majority of 8,028.
Following the 17 June poll, Sarah said, "Tonight the voice of Chesham and Amersham is unmistakable. Together we have said, 'enough is enough, we will be heard and this government will listen'."
Lib Dem leader, Ed Davey added, "This is a great result, a huge swing to us. There are many Conservatives across the country who are now worried.
"People have been talking about a red wall. Well, after Chesham and Amersham and Sarah Green's victory, they'll be talking about a blue wall and how the Lib Dems are the main threat to the Conservatives."