The modifications pushed the UK further below the rest of the board — wiping away nearly a third of the points they picked up on the night.
Fortunately, the Netherlands’ winner Duncan Laurence was unaffected.
The revision resulted coming from an error following the dismissal of the Belarussian jury, which had broken the rules by revealing their votes coming from the first semi-final.
An aggregated result was substituted for the judges coming from Belarus, although human error led to a miscalculation, the European Broadcasting Union (EBU) said.
The UK is usually accustomed to dire performances at Eurovision, having finished inside bottom a few in seven of the last 12 contests.
although its embarrassment in Tel Aviv was even worse than usual — Britain hadn’t claimed last place since 2010.