There are 3 million EU nationals living in the UK. About 1.2 million UK nationals live abroad in other EU countries.
In June 2016, more British people voted to leave the EU than to remain part of it. This has become known as Brexit.
The expected leaving date is 29 March 2019, but the process to leave has already begun. At present the UK is still part of the EU.
Three things you should know if you're an EU citizen living in the UK
1. EU laws are in force in the UK for as long as it's part of the EU.