These Regulations consolidate the Registration of Marriages Regulations 1986 (“the 1986 Regulations”) and the Registration of Marriages (Welsh Language) Regulations 1999, and five amending instruments. They also make substantive amendments in consequence of Part 4 of the Immigration Act 2014 (c. 22), which introduces a new referral and investigation scheme to assist investigation by the Secretary of State of suspected sham marriages and civil partnerships.