At present there is no single "sham marriage" offence.

BBC: Wales

Finally, on Thursday in Greenock, a 23-year-old Pakistani man was arrested before he could take part in what he admitted was a sham marriage to a 25-year-old Czech woman with an address in Glasgow.

BBC: Wedding rings

In January, three Slovakian nationals were jailed for three years each for smuggling two people into the country, one of whom was to be used in a "sham" marriage.

BBC: Human trafficking victims