The Economist: 95% chance of a big Boris majority

There is a 95% probability that incumbent Prime Minister Boris Johnson will between 333 and 387 seats, according to The Economist. 

The opinion polls have already predicted a landslide victory for Johnson's Conservative party. 

Key points

Our best guess is that they (Conservatives) will win 357 seats. 

That would make it the largest party and give it more than the 326 needed for a majority.