Reform Intelligence
Context Intelligence

Brexit Impact Tracker

An evidence-based analysis of Brexit's economic impact, a structured record of Vote Leave claims and their factual status, and a summary of the academic and institutional consensus. Reform UK is the political successor to the Brexit Party and UKIP — understanding Brexit's outcomes is essential context for evaluating their current platform.

Methodological note: Economic impact estimates use counterfactual modelling — comparing actual UK economic performance against a modelled scenario in which the UK did not leave the EU. This methodology is standard in economic research but involves assumptions. The range of estimates (−4% to −8% GDP) reflects different modelling approaches. All studies cited are peer-reviewed or produced by independent public institutions. The "debunked claims" section uses fact-checks from Full Fact and Channel 4 FactCheck — both are politically independent organisations.
−6 to −8%
GDP impact vs counterfactual
2016–2025 cumulative
Source: UK in a Changing Europe / NIESR
−15%
Trade intensity reduction
vs non-Brexit counterfactual
Source: OBR / CEPR
−£40bn
Annual tax revenue loss (est.)
Due to reduced economic output
Source: OBR
8
Major Vote Leave claims
Documented and fact-checked
Source: Full Fact / Channel 4
UK GDP Gap vs Non-Brexit Counterfactual (%)

The estimated gap between actual UK GDP and modelled GDP in a scenario where the UK did not leave the EU. A value of −6% means the UK economy is estimated to be 6% smaller than it would otherwise have been. This is not the same as GDP falling — the UK economy has grown, but more slowly than comparable economies.

2016201720182019202020212022202320242025-10%-7%-4%-1%2%No Brexit counterfactual
Source: UK in a Changing Europe / NIESR · Estimates are central estimates; range is −4% to −8%
UK Trade Index (2016 = 100)

Indexed to 2016 baseline. The sharp drop in 2021 reflects the Trade and Cooperation Agreement coming into force.

201620172018201920202021202220232024808794105
Source: ONS UK Trade Statistics / OBR
UK Foreign Direct Investment Index (2016 = 100)

FDI into the UK fell significantly after the referendum and has not recovered to pre-referendum levels relative to comparable economies.

201620172018201920202021202220232024758391105
Source: ONS FDI Statistics / OECD