Turnout at the Newark by election looks like having been around 53% - high for a by election.
A party source has told ITV News that with the mainly urban areas (which favour Ukip over the Tories) counted the numbers look like Cons 37%, Ukip 33%, Labour 18%, Lib Dems 2%.
Labour are briefing that the Conservatives have thrown everything from the kitchen sink to the Aga at this and still lost a lot of votes to Ukip.
The Conservatives say if they win this it'll be their first by election victory whilst in Government for 25 years.
More top news
Danish submarine inventor Peter Madsen has been sentenced to life in prison for torturing and murdering Swedish reporter Kim Wall.
A BBC chief said reporters also had a responsibility to be sensitive in their broadcasts.
Ruth Smeeth is due to give evidence at a hearing involving party member Marc Wadsworth.