Liberal Democrat president Tim Farron has called the Eastleigh election the most "important by-election since the war."
His party's candidate Mike Thornton won the by-election with a majority of 1,771.
Speaking to Daybreak he said the win was an "outstanding" result, that speaks volumes about the Lib Dems' place in the next general election.
The Conservative Party has a habit of turning a drama into a crisis. Especially when the background to the drama is Europe.
The wider political impact of parliamentary by-elections often turns out to be more important than the result – Eastleigh is no exception.