Incoming Prime Minister Andy Burnham is set for his first significant political challenge as Labour MPs signal a potential revolt over the government's Immigration and Asylum Bill. Dozens of left-wing members are reportedly considering abstaining or voting against the bill during its second reading on Monday evening.

The core of the dissent centers on provisions that would prevent refugee status from being permanent. Under the proposed changes, individuals granted asylum would face reviews every 30 months to assess whether they can safely return to their home countries.

Rebel MPs are also raising concerns about plans to extend the waiting period for migrants to gain permanent settlement status in Britain from five years to ten. There are fears that without these changes, approximately 1.6 million individuals who have arrived since 2021 could become eligible for indefinite leave to remain and associated benefits.

While these extended timelines are not part of the bill currently under consideration, 80 backbenchers have written to Burnham urging him to compel the Home Secretary to alter course. Sources close to Burnham suggest he understands the importance of controlling immigration, but the letter from MPs highlights constituent concerns that illegal immigration is a greater worry than the settlement of essential workers like nurses and care workers.

The backbenchers warned that the current approach, under Home Secretary Shabana Mahmood, risks alienating voters and mirroring the policy positions of the Reform party. They argued that retrospectively doubling the ILR period does not meet a fairness test and that the party is expending significant political capital and resources on a policy that lacks broad understanding or support.

Mr Burnham - set to be PM in just a week - will have to decide whether to vote for the legislation, signalling support for Shabana Mahmood's (pictured) reforms

Negotiations are reportedly underway for a potential compromise. One possibility being discussed is maintaining the current five-year ILR period for individuals already in the country, while simultaneously curbing their access to benefits.

The vote on the bill's broad principles is scheduled for this evening. Historically, significant rebellions often occur during later stages of legislative process when specific amendments are debated. This vote will serve as an early indicator of Burnham's ability to manage internal party dissent on a significant policy issue.