Labour are celebrating big wins in the Blackpool South by-election, in the local elections and in most of the mayoral races that have declared so far.   The Conservatives could lose up to 500 councillors, though their candidate Ben Houchen did hold on to his role as mayor of Tees Valley. A win which gave the prime minister something to be pleased about and will probably help him keep his job for now.  But are these grim results for the Tories enough to see Labour winning the next election? Sky News's projection is that it won't be. They will be the largest party but short of an overall majority.  On the Sky News Daily Niall Paterson talks to Professor Michael Thrasher who carried out the analysis and Sky's deputy political editor Sam Coates on what signals we can take from these results.   Producer: Emma Rae Woodhouse  Podcast Promotions Producer: Jada-Kai Meosa John Editor: Wendy Parker