It's quite a reasonable assumption. The main complaint about migration in the UK is with respect to low skilled migrants. As the UK was totally unable to contr

It's quite a reasonable assumption. The main complaint about migration in the UK is with respect to low skilled migrants. As the UK was totally unable to control EU migration (a lot of which is low skilled migrants from Eastern Europe) it had to try to 'get the numbers down' from non-EU sources. Now that the UK will be sovereign, in control of it's borders again, it will be able to limit low skilled migration from the EU and allow more high skilled migrants from everywhere.