Do not change ILR qualification period, PSW duration for existing immigrants.

Retroactively applying new immigration rules to existing immigrants violates the principle of legal certainty. These individuals made life-altering decisions based on current policies, investing in homes,careers, and communities under a legitimate expectation of stability. Changing requirements midway creates severe hardship, disrupting established lives and breaking implicit social contracts. It undermines trust in government, UK's international reputation and contradicts fundamental principles