going to move on now. the liberal democrats are celebrating a stunning by—election victory, after winning a seat that has been conservative for almost half a century. sarah green won chesham and amersham in buckinghamshire byjust over 8,000 votes, overturning a tory majority of 16,000. the lib dem leader, sir ed davey, says the conservatives have ignored local voters, and their "blue wall" of southern seats is now crumbling. 0ur political correspondent iain watson reports from chesham. the liberal democrat party is duly elected. the lib dems say they've created a political shock wave, their candidate, sarah green, defeated the conservatives' peter fleet by a wide margin, gaining more than half the votes cast. thank you. know what happens when a really powerful, strong orange force goes against a blue wall? the liberal democrats are claiming they can demolish conservative majorities in the same way as borisjohnson's party tore through labour strongholds in the north of england at the last election.