British Prime Minister Gordon Brown's Labour party on Friday suffered a "damaging" defeat with Conservatives winning the Norwich North parliamentary seat by more than 7,000 votes in a hotly disputed by-election.
Chloe Smith (27) of the Conservative won with a majority of 7,348 votes becoming the youngest lawmaker of the House of Commons.
It was the first Westminster election since the MPs' expenses scandal broke in May.
There were a dozen candidates in the fray, but the main fight was between Chris Ostrowski of Labour and Conservative's Chloe Smith.
The by-election was triggered by the stepping down of former Labour MP Ian Gibson. He quit allegedly when the party barred him from standing at the next general election over his expenses claims.
The Labour party went to the polls yesterday to retain the Norwich North constituency it held by 5,549 votes in the last 2005 election.
But the defeat, dubbed as "damaging", has pushed the party into the second place in Norwich North in east England.
The by-election was termed as Brown's first electoral test since the leadership crisis in May.