Zack Polanski, the Green Party conference speaker and a Holborn & St Pancras by-election hopeful, is set to call for new controls on private rent rises. Multiple reports say he will argue for a three-year “emergency brake” that caps how much rents can increase.

The proposal is framed as a response to housing pressures and as an issue of fairness between generations. The BBC and other outlets describe the policy as a “three-year” limit on rent growth, while the Mirror and Evening Standard report that the idea is presented in a way similar to a “triple lock” approach.

Outlets also highlight internal and political context. The Mirror reports that the stance could trigger a row within the Green Party and position Polanski as pushing the party to place pressure on the Labour government, particularly if it gains ground in the Holborn & St Pancras by-election.