Question to the HM Treasury:

To ask the Chancellor of the Exchequer, whether was she informed by the Office for Budget Responsibility in advance of the (a) Autumn Budget 2024 and (b) Spring Statement 2025 that it was likely to conduct a review of productivity forecasts at a forthcoming fiscal event.

Answered by Lucy Rigby - Economic Secretary (HM Treasury)

The OBR regularly reviews its forecast assumptions. As set out in its latest annual Forecast Evaluation Report, published in July 2025, the OBR noted that they are "currently conducting our regular summer supply stocktake, which involves research into our potential output forecast and its components."

As the Government’s independent official forecaster, the OBR has full discretion over the judgements underpinning its forecasts.

Question to the HM Treasury:

To ask the Chancellor of the Exchequer, when she was first informed by officials in her Department that the Office for Budget Responsibility was likely to conduct a review of their productivity forecasts.

Answered by Lucy Rigby - Economic Secretary (HM Treasury)

The OBR regularly reviews its forecast assumptions. As set out in its latest annual Forecast Evaluation Report, published in July 2025, the OBR noted that they are "currently conducting our regular summer supply stocktake, which involves research into our potential output forecast and its components."

As the Government’s independent official forecaster, the OBR has full discretion over the judgements underpinning its forecasts.

Question to the HM Treasury:

To ask the Chancellor of the Exchequer, when was she first informed by the Office for Budget Responsibility that they planned to review the Government's productivity forecasts.

Answered by Lucy Rigby - Economic Secretary (HM Treasury)

The OBR regularly reviews its forecast assumptions. As set out in its latest annual Forecast Evaluation Report, published in July 2025, the OBR noted that they are "currently conducting our regular summer supply stocktake, which involves research into our potential output forecast and its components."

As the Government’s independent official forecaster, the OBR has full discretion over the judgements underpinning its forecasts.

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Found: Gareth Davies 7 November 2025 Comptroller and Auditor General National Audit Office 157–197 Buckingham

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