The UK Migration Advisory Committee has published a briefing note as a first step in their analysis of the impact of international students in the UK. MAC is an independent, non-statutory, non-time limited, non-departmental public body that advises the government on migration issues. MAC has been commissioned by the UK Home Office to assess the impact of international students in the UK.
In the document: “International students, a briefing note to accompany the call for evidence”, they show that entrance statistics of foreign students has decreased from over 220 000 in 2011 to 139 000 in 2017 and the proportion of visa awarded for the study has gone down from 35% to 7%. They also show that 95% of visa students either get an extension or are shown to have left the country. Of 4%, it is not sure how many have stayed out-of-status and how many have left, e.g. on a second passport or through a Common Travel Area.
Last but not least, they show the proportion of EU and non-EU students relative to UK students: international students make out 20% of the total student population and even 38% of graduate students.