Labour leader Ed Miliband says his party are ready for an Autumn by-election when candidates will compete for the Corby seat left by Conservative MP Louise Mensch.
The moment Labour returned to power in Derby. Their 4th gain of the night.
The 4th they needed to clinch victory.
For the Tories it was a grim night.
The former leader of Derby City Council admitted tax changes in the budget and issues such as Bombardier had hit them hard.