Chapter IV of Directive 2004/38 and Regulation 15 of the Immigration (EEA)
Regulations 2006 provide for the right of permanent residence for EEA nationals and
their family members under European Law.
EEA nationals and their family members who have resided in the UK in accordance
with the 2006 Regulations for a continuous period of 5 years acquire the right of
permanent residence. In certain circumstances a right of permanent residence is
acquired in less than 5 years.
Continuity of residence is not affected by temporary absences (generally not
exceeding 6 months per year).
Once an EEA national (or their family member) has acquired permanent residence in
the UK it can only be lost if they leave the UK for more than 2 consecutive years.
This right is subject to Regulation 19(b) concerning Public Policy, Public Security and
Public Health.
More information here
http://www.ind.homeoffice.gov.uk/documen...iew=Binary