Mr Flynn said the union had been holding talks with management which were due to be discussed by the executive committee of the PCS's immigration section.

BBC: Immigration staff vote to strike

Registrars are encouraged to report their suspicions of a suspect marriage or civil partnership under Section 24 of the Immigration and Asylum Act 1999.

BBC: UKBA alerted over suspected sham civil partnerships

The Department of Homeland Security (DHS) wants more people to use section 287(g) of the Immigration and Nationality Act.

ECONOMIST: Illegal immigration