Hogwash.
The main voter concerns are the cost of living crisis and the NHS crisis (which will get worse over the winter).
The Tories have made ‘illegal’ immigration their central platform, together with promoting culture wars they talk of little else.
Clearly the Tory focus on immigration failed, two absolute hammerings in these bye-elections ought to have driven that message home.
Corbyn is not a member of the Labour Party
Tony Blair is not coming back or deciding any policies.