If you are an EEA national or the (non-EEA) family member of an EEA national, then the laws governing your rights of residence, work and study in the UK derive from European Freedom of Movement laws rather than the British Immigration Rules. European law impose less strict rules and requirements on you and your family members’ rights of stay.
Although there is no mandatory requirement for you to obtain a Registration Certificate, you may find it useful and indeed necessary to prove your status and legal rights to any prospective employer or education provider.
A family member wishing to travel to the UK to join or accompany an EEA national can apply to the British Embassy in their country of origin for a family permit.
Particularly in the current post ‘Brexit’ climate, many people want to know whether they can apply for permanent rights to remain in the UK as an EEA national or as their family member.