Labour will be seen to be instrumental in stopping the ridiculous grammar school plans (massively opposed by the public) and their popularity will increase and continue to increase and build momentum as it was doing until these MPs decided to shoot themselves (and the party) in the foot by squawking for a new leader after brexit .
About May's move on Grammar schools. The proposed Grammar Schools would be nothing like the old ones. But it's clearly a political movement, since she's seeking to appease Tory parents. It's not about equality, since you can achieve that much more quickly simply by eliminating all public schools. And then there's the thorny issue of Faith schools.
I'm not sure you're right, though, when you say "
their popularity will increase and continue to increase and build momentum " if only because most voters instinctively mistrust extremes. That's what eventually doomed Thatcher, saw Labour unable to win an election for years in the past and will, I suspect, finish Labour as an electoral force. I don't doubt membership of the Labour Party has rocketed over the past 12 months, but that's not the same as the voters being inclined to vote for them. What it
does mean is that JC's leadership has drawn back in a lot of activists who have long felt sidelined by the centrist policy of previous Labour administrations. And that's not necessarily good for the party as a whole.
But we really do live in interesting times. The next few months will be fascinating.