UK faces ‘very difficult trade-offs’ in budget because of Iran war, say analysts

by | Jul 29, 2026 | Business

UK faces ‘very difficult trade-offs’ in budget because of Iran war, say analysts

Economic analysts at the National Institute of Economic and Social Research have cautioned that the UK government will confront substantial fiscal challenges in its forthcoming autumn budget, with the ongoing Iran war driving up energy costs and inflation. The thinktank revised downward its estimate of available spending headroom for the chancellor from slightly above £7bn to approximately £3bn, citing persistent inflationary pressures stemming from disrupted oil supplies and geopolitical uncertainty.

The institute projects inflation will climb to 3.8% over the coming months, with oil prices having risen above $100 per barrel and the strait of Hormuz largely inaccessible since March. This inflationary environment is expected to necessitate an additional £24bn in funding by decade’s end to maintain existing service levels and real-terms welfare provisions. The economic forecast also anticipates slower growth, with the UK economy expanding at just 1.1% this year and the same rate in 2027, representing an estimated £28bn in foregone growth compared to projections made earlier in the year.

Prime Minister Andy Burnham has announced several significant initiatives, including a commitment to establish an NHS-style social care system available without charge by 2035, estimated to cost £18.5bn. Additional policy priorities include enhanced support for one million young people not engaged in education or employment, expanded mental health services, and education system reforms. Institute leadership has warned against relying on increased borrowing to finance these commitments, noting that national debt has already reached nearly £3tn or 95% of annual income.

Economic forecasters suggest that sustainable funding for new initiatives should derive from taxation increases or spending reallocations rather than additional borrowing. Potential revenue sources identified include introducing a land value tax, broadening the VAT base by eliminating various exemptions, and strengthening tax compliance among high-net-worth individuals and corporations. The NIESR expects inflation to average 3.1% this year, peaking at 3.8% in February 2027, with a return to the Bank of England’s 2% target delayed until early 2029.

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