On February 3, 2004, the United Kingdom's National Statistics Office released the first figures pertaining to same-sex couples in England and Wales. Scotland and Northern Ireland were later released (see navigation below). Recently, however, the National Statistics Office, made a dramatic downward revision to some of the figures in England and Wales, and such change was reflected in this site.

The tables and data here are part of the second part of the National Report for England and Wales. The are Univariate table 93 (UV93).

In the data validation report, National Statistics informed that:

The validation process detected that there was an inflated number of same sex couples, both with and without children. The main reasons were:

• the form filler ticked the wrong sex for one person;
• duplicate instances of the same person;
• 'Partner' being imputed when the relationship matrix was incomplete or inconsistent;
• the One Number Census process adding a person into an existing household; and
• the Household Composition Algorithm deriving an incorrect family type.

A set of automated checks, including analysis of first names to check whether the wrong sex had been ticked, was carried out to identify people who fell into the above categories. Where couples could not be decided automatically the record's validity was decided manually. A few households containing more than one potential same sex couple were passed straight to manual checking.