https://www.mynewsdesk.com/uk/maritalaffair/blog_posts/are-affairs-easier-than-ever-for-uk-women-22146
18 Nov 2013 ... ... to conduct extramarital affairs. She found that whilst infidelity was part and parcel of most French marriages, in the UK a cheating partner was ...

https://www.gov.uk/browse/births-deaths-marriages/marriage-divorce
Includes getting married abroad, decree absolutes and looking after children.

https://yougov.co.uk/topics/lifestyle/articles-reports/2015/05/27/one-five-british-adults-admit-affair
27 May 2015 ... The survey also investigated who were the most likely partners. 43% have had an affair with someone who qualified as a friend, while 38% have ...