Brexit is still in effect but this election performance might suggest that a new referendum will be held and this time the Moslem voting bloc is probably large enough to sway it. The tacit argument will be that eith Brexit a fact or on the way it will be harder for more paynim to cross into Britain. That should bring out the mussulmans to vote. The Moslem Conquest of Britain is well in progress and will only accelerate.Shariah is already the law of the land and its enforcement is being implemented at a rising rate.
Brexit will have little or no effect on third world immigration, since the UK was never part of the EU/Schengen open borders area, and has always controlled its own borders. Both pre-Brexit and post-Brexit, who comes in from beyond Europe will continue to be, as it always has been, the responsibility of successive British governments, not the EU.