“A United Kingdom” and “Land of Mine”

Whoever loved that loved not at first sight? For Ruth Williams (Rosamund Pike) and Seretse Khama (David Oyelowo), the sighting occurs in London, in 1947. Near the start of “A United Kingdom,” which is based on a true story, they meet at a Missionary Society dance, an event not easily mistaken for the toga party in “National Lampoon’s Animal House.” Eyes lock, hearts stop, and soon—after a few decorous dates—Seretse is down on one knee, offering Ruth a ring and the prospect of a life together. “I don’t need to think about it,” she says, with a briskness befitting her profession as a clerk. So that is that.