Public Infrastructure Delay in the British Isles — What the Data Tells Us

Across the British Isles, public infrastructure projects are not just running late — they are running late at enormous and measurable cost to the public. From Northern Ireland, to the comparator, New South Wales, the pattern is consistent: political uncertainty, procurement failures, contractor disputes, and chronic underfunding combine to push completion dates further into the future and budgets further beyond original estimates.

At QUINTIN QS, we track 280 live infrastructure schemes across seven jurisdictions — Northern Ireland, Republic of Ireland, Scotland, Wales, London, England, and Australia. Each scheme is monitored for cost variance, delay in weeks, and the primary cause of that delay.

This post summarises the top three delay factors identified across all seven jurisdictions, drawn directly from the CPD dashboard dataset. The findings are stark, the causes are often avoidable, and the cumulative cost to the public is running at hundreds of pounds, euros, and dollars every single second.

A one-page summary report is available to download below. It presents the ranked delay factors for each jurisdiction, with scheme counts, percentages, and representative examples.

03-07-2026 Updated with Casement Park news

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