The number of EU workers actively searching for jobs in the UK has dropped by 11% since the EU Referendum in June, according to research from job board Monster.

Monster’s data showed that workers from Romania were the least likely to come to the UK to work as job search traffic on Monster from Romania fell by 52% since June 2016. This was followed by Portugal (41%) and Poland (34%).

Despite the overall decline in EU jobseekers looking for work in the UK, job searches from Sweden were up by 20%, this was followed by Finland (18%) and Germany (1%). Monster also reported a rise in searches from some countries outside the EU, including the US and the Philippines. Most of the job searches, 80%, came from the UK.

Meanwhile, among job categories, Business/Strategic Management saw the biggest drop in job searches (24.9%), followed by Sales/Business Development (21.7%).

“While the proportion of international traffic from outside the EU has increased, a fall in active searches from EU Countries in the wake of the referendum threatens to leave UK businesses unable to fill critical skilled roles,” Sinead Bunting, VP Marketing Europe, Monster.co.uk, said. “And things could get even more challenging.

“While no one knows for sure what kind of deal the UK will get as it exits the EU, it seems certain we will end up with controlled movement of EU workers, further restricting the supply of labour against a background of rising vacancies and full employment. To counter this, successful companies must focus recruitment efforts on passive job seekers – those not actively looking,” Bunting said