According to the Home Office a "sham" marriage or "sham" civil partnership typically occurs when a non-European national marries someone from the European Economic Area as a means of attempting to gain long-term residency and the right to work and claim benefits in the UK.
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Bosses say the site will continue to be managed safely and securely throughout the industrial action.
A look ahead at the forecast for the Border region.
Wheelchair basketball teams from across the UK travelled to Penrith at the weekend to compete in The Hannah Ayling Memorial Cup.