The headline figure is 40% support for the Conservatives. But that hides a real truth - support is low amongst younger people and higher amongst older people.
And older people are more likely to vote.
This is from You Gov - it's based on 11,500 people - so a much bigger survey - and more reliable.
yougov.co.uk/topics/politics/articles-reports/2019/10/31/2019-general-election-demographics-dividing-britai
So basically, if you want to get rid of the Conservatives, get younger people out to vote.