How is Boris keeping the Tories so unified?

In the first session of PMQ's completely Covid restriction free, Keir Starmer proved that the Prime Minster wouldn't commit to definitely getting rid of the NHS waiting list within three years or the risk of people having to sell their homes to pay for care. But Boris Johnson seemed pretty bullet proof with not a whiff of tory rebellion even though some of his new policies go against his members more conservative principles.  Katy Balls talks to James Forsyth and Isabel Hardman about today's session.