EEA citizens enjoy the right of admission and work to the UK without leave to enter or remain.
You can sponsor your non-European national family members to join you in the UK. Your family members are your spouse, civil partner, unmarried partner, under 18 children, parents, parents of your non-European spouse, brother and sisters who are dependent on you.
If you are an EEA national and you have lived in the UK for five years continuously and during your residence you have exercised your treaty rights in the UK.
You may be eligible to apply for Permanent Residence. This means that a PR can be stamped in your passport.
If you are a non EEA family member of an EEA national and you have lived in the UK for five years continuously and during your residence your EEA family member has exercised their treaty rights in the UK.
If you are a non-European national family member of a European national and you were granted a residence permit in the UK but you ceased to be a family member anymore because of different reasons. For example divorce, death, departure of EEA national from the UK. You may be eligible to stay in the UK within your own rights. This is called retained rights of residence.
This is a specialist area of law, therefore we strongly advise you to seek our expert legal advice.