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NIESR slashes UK growth forecast as Iran war and inflation hit economy

Published by Global Banking & Finance Review

Posted on April 28, 2026

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· Last updated: April 28, 2026

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NIESR slashes UK growth forecast as Iran war and inflation hit economy
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NIESR Slashes UK Growth Forecast as Inflation and Iran War Slow Economy

UK Economic Outlook Amid Inflation and Geopolitical Tensions

By Suban Abdulla

Growth Forecasts and Inflation Projections

LONDON, April 29 (Reuters) - Britain's economy faces a sharp slowdown this year and in 2027 due to the Iran war, and inflation will stay above the Bank of England's target until 2028, according to forecasts from a leading think tank published a day before the BoE sets interest rates.

The National Institute of Economic and Social Research said on Wednesday it expected the pace of price growth to speed up to 4.1% at the start of 2027 from 3.3% now due to the surge in oil and gas prices caused by the conflict in the Middle East. 

It projects Britain's inflation rate - the highest of any advanced economy for much of the past four years - to return to the BoE's 2% target only in 2028.   

Revised Growth Figures

The economy looks set to grow by just 0.9% this year and 1% in 2027 - sharply below NIESR's previous growth forecasts made in February of 1.4% and 1.3% for this year and next.

"The Middle East conflict has laid bare the fact that the UK remains highly exposed to global energy shocks," David Aikman, NIESR's director, said.

The think tank's 2026 growth forecast was slightly above the IMF's latest projections.   

Bank of England's Response and Economic Risks

BOE Faces 'Dilemma'

NIESR said it expects wage growth to slow to 3.3% in 2027, as the labour market weakens. The unemployment rate is projected to peak at 5.5% in the fourth quarter of 2026, slightly above the February forecast. 

Adverse Scenarios and Rate Hikes

In an adverse scenario, with the conflict dragging on and oil prices rising further, NIESR warned there was a "high likelihood" of Britain entering a recession in the second half.

It predicted the BoE would raise rates only once this year in July, increasing benchmark borrowing costs to 4% from 3.75%.

But BoE policymakers would need to hike interest rates by 150 basis points, equivalent to six quarter-point increases taking the Bank Rate to 5.25%, in the adverse scenario.

The British central bank is due to publish its own updated economic forecasts on Thursday alongside an expected decision to keep rates on hold. Financial markets were on Tuesday pricing two or possibly three rate increases by the end of 2026.

Fiscal Policy and Debt Trajectory

NIESR said finance minister Rachel Reeves - who is under pressure to help support households facing a rise in the cost of living - would need to run primary budget surpluses, a feat Britain last achieved in 2001, to get a grip on Britain's "unfavourable" debt trajectory.

($1 = 0.7411 pounds)

(Reporting by Suban Abdulla; Editing by Hugh Lawson)

Key Takeaways

  • NIESR forecasts inflation rising to 4.1% in early 2027 due to oil and gas price spikes, delaying a return to the 2% target until 2028.
  • UK growth downgraded sharply: GDP now expected to expand just 0.9% in 2026 and 1.0% in 2027, versus February projections of 1.4% and 1.3%, respectively.
  • NIESR projects unemployment peaking around 5.5% in late 2026, warns of possible recession in adverse scenario, and urges primary budget surpluses—last achieved in 2001—to manage worsening debt dynamics.

Frequently Asked Questions

When is UK inflation expected to fall to the Bank of England's target?
According to NIESR, UK inflation is only expected to return to the Bank of England's 2% target in 2028.
How might the Bank of England respond to current economic conditions?
NIESR predicts a single rate hike by the Bank of England in July, with more increases possible if the Middle East conflict continues.
What is the new UK economic growth projection for 2024 and 2027?
NIESR forecasts UK economic growth at 0.9% in 2024 and 1% in 2027, both lower than previous predictions.
How could the Iran war affect the UK economy further?
If the Iran war drags on and oil prices rise further, NIESR warns there is a high likelihood Britain could enter a recession in the second half of the year.

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