Divorce

Divorce was generally the legal dissolution of marriage. In the United States of America, however, one could "divorce" one's own parents. (TV: The Categories of Life)

History
Henry VIII divorced two of his wives, Catherine of Aragon and Anne of Cleves. (PROSE: The Roundheads)

According to one account, Susan Foreman and Temmosus Skyedron had married and divorced in the 20th century. (AUDIO: Whatever Happened to Susan Foreman?)

Duggan used to do divorce investigations prior to his involvement with the Fourth Doctor and the theft of the Mona Lisa in 1979. (TV: City of Death)

Prince Andrew and Sarah Ferguson's marriage ended in divorce. (AUDIO: Spaceport Fear)

In the late 2000s, Maria Jackson's parents, Alan and Chrissie, were divorced. (TV: Invasion of the Bane)

Francine and Clive Jones were divorced at some point after most of their children were young adults. (TV: Smith and Jones) Rory Williams once got Amy Pond's signature on divorce papers, but the Eleventh Doctor arranged a reconciliation before he had an opportunity to file them. (TV: Asylum of the Daleks)

Kate Stewart was divorced. (TV: Death in Heaven)

Other references
On 7 November 1987, Pete Tyler was late to the wedding of Stuart Hoskins and Sarah Clark at St Christopher's Parish Church, having been saved from the car that would have killed him by his time travelling daughter, Rose Tyler. In response to his late arrival, Pete's wife Jackie Tyler frustratedly threatened that there would be a wedding and a divorce on the same day if he was not careful. Ironically, Pete died later that day as he gave his own life to save Earth from the Reapers. (TV: Father's Day)

In 2011, Gwen Cooper revealed to Rhys Williams that one could divorce one's own mother in the United States of America, which Rhys quipped was an example of Americans doing things better. (TV: The Categories of Life)