For marriage or civil partnership to be contracted in the UK between a UK National and a Non-EU citizen, a certificate of approval for C.M./C.P. is required to be presented to celebrant. However an exemption is made for Church of England ceremonies where marriage license can be requested from ecclesiastical court. In my opinion UK currently has a miscegenations law due to the fact that marrying a person of certain nationalities are more difficult. This so called approval is not a hall pass for the visa and the couple can still be separated if further leave to remain is denied. An almost identical process is needed to obtain visa. While ability to join perspective spouse is a different matter it seems that government now has a say who shouldn't or should be joined in a wedlock.
Home Office and the parliament should have a gut to call this a miscegenations regulation and also to acknowledge openly of their xenophobia. This is yet another bigotry committed and promoted by Labour government. Duty of a government is to protect the vulnerable, to maintain a fair society through procuring education, crime prevention, dispensing justice, it was not ordained to legislate relationships and individual conscious.