General election: When does a recount happen?

If things are as tight as the general election exit poll suggests there may be some very close results in Croydon and across the country.The fairly rare occurrence of a recount can be needed when the result in a constituency is extremely close.Croydon Central, with a margin of only 165 votes between Gavin Barwell and Sarah Jones, could need one tonight.READ MORE: General election 2017: Croydon election results - live updatesCandidates can request a recount to produce a decisive – or more..