Question to the HM Treasury:

To ask the Chancellor of the Exchequer, what information her Department provided to the Office for Budget Responsibility on the immigration measures in Budget 2026 before its October 2026 forecast.

The Office for Budget Responsibility (OBR) has full discretion over its forecast methodology and the judgements underpinning its forecasts, including its assessment of the impact of government policies. HM Treasury shares policy detail and analysis when requested by the OBR, in line with the OBR’s legislative right of access to government information to complete its duty. The OBR sets out in its Economic and Fiscal Outlook the government policies it has assessed and reflected in its forecast.