The UK's decision to leave the EU has coincided with a considerable decline in foreign direct investment into the country.

Overseas investment to the UK may be some 19 per cent lower because of the vote to leave the EU, according to the new report by the researchers at the UK Trade Policy Observatory (UKTPO) at the University of Sussex.

Despite a buoyant 12 months for the world economy in 2017, inflows of Foreign Direct Investment (FDI) to the UK have continued to decline since reaching a peak in 2015.

For the UK, it is the longest continuous decline in FDI since records began with a 10 per cent reduction in the number of projects and an estimated US $1.5 billion reduction in the value of capital investment between 2016 and 2017.

Dr Ilona Serwicka, UKTPO Research Fellow in the Economics of Brexit at the University of Sussex and co-author of the briefing paper, said: “Our research has shown that there has been a considerable drop in FDI since the vote to leave the EU and if the trend is not reversed, there could be serious damage to the UK economy in the medium-long run. This fall in FDI could be due to a temporary adjustment because of the current climate of uncertainty. But it could also indicate a permanent shift away from the UK by foreign investors.”

The UK remains one of the largest recipients of FDI in the world, with almost 1,000 greenfield investment projects in 2017 totalling more than US$33 billion and creating approximately 60,000 new jobs.

But the uncertainty over the UK’s future caused by the EU Referendum result has seen the country lose its status as the largest recipient of greenfield FDI in Europe. In 2017, the UK was overtaken by Germany as the largest European recipient of FDI with France also gaining ground.

In early 2015, a quarter of all FDI projects into the EU28 were destined for the UK. By late 2017, this proportion had fallen to 18 per cent.

In the services sector, which accounts for around three-quarters of the UK economy, the loss of investment is estimated to be as high as 25 per cent. Sectors hit hardest include high-value-added industries such as software publishing, investment management and retail banking with the post-Brexit reduction in FDI putting high-skilled jobs at risk.

Nicolo Tamberi, Research Officer in the Economics of Brexit at the University of Sussex, said: “The UK is attractive for FDI for a number of reasons, including the UK’s status as a member of the EU that offers businesses investing here easy access to the European Single Market. But the drop in FDI that we observe suggests that the prospect of losing unfettered access to the EU Single Market once the UK leaves the EU could lower investors’ appetite to invest in the UK.”

Over 12,000 inward investment projects to the UK worth were recorded between 2003 and 2017 with 8,000 different companies investing a total US$540 billion and creating almost 900,000 jobs. This figure includes all project-based ‘productive’ investment that resulted in new capacity, but excludes mergers and acquisitions.

UKTPO researchers computed the size of FDI inflows for a “synthetic UK”, a weighted average of other similar countries (a control group), which is taken to tell us what would have happened to the UK in the absence of Brexit. 

This was done by analysing a set of FDI determinants (such as GDP, population, trade openness, market potential, corporate tax rate, employment share and employment share in the services industry, cost of labour, education level) to derive a series of weights for each country in the control group in the pre-Brexit period. Assuming that these weights remained unchanged in the post-Brexit period, inflows of FDI to the “synthetic UK” were calculated.