Keep in mind that unlike practically everywhere else, unless they've changed it, the U.K does not release partial election results, but only announces the result when all the polls have have been counted. All the candidates appear on a stage together when the results are announced. This has made for some amusing television seeing some of the candidates of the Monster Raving Loony Party on the stage.
The British system does almost always enable the final result of a constituency election to be known, within one or at most two days of the election.
It would be nice to have official vote totals for each polling district (the smallest geographical area into which constituencies are divided - there are usually one or more per local government ward, which are the usual building blocks for the constituencies at least in England). However no one seems to want such a system, which is surprising since all parties would benefit from having the additional information.