You don't appear to understand either electoral dynamics, political tribalism or the current political system of "parliamentary democracy".
Local party members don't have the power to choose their prospective parliamentary candidate. The hierarchy of the national party allocated that power to itself 20 years ago, in order to parachute followers of the Blairite project into seats.
Yes, but the above won't be elected by the electorate if you are correct with your ear to the ground.
I suspect you talk bollocks and they'll be elected with significant majorities.