TCTM02077 | Entitlement: Residence rules - Right to reside: A student
From HM Revenue & Customs · Tax Credits Technical Manual
The Immigration (European Economic Area) 2006 Regulations, regulation 4 (1) (d)
Students - European Economic Area (EEA) or Swiss nationals
A student means a person who:
is enrolled in a recognised educational establishment in the United Kingdom for the main purpose of following a vocational training course; and
assures the Secretary of State that they and any of their family members have sufficient resources to avoid them becoming a burden on public funds; and
is covered by comprehensive sickness insurance in the United Kingdom (a valid EHIC issued by the European Economic Area (EEA) country of origin would satisfy this condition for students).