First grandchild for Prince Michael of Britain

Prince Michael of Britain, a first cousin of Queen Elizabeth II, has become a grandfather for the first time. His son, Lord Frederick Windsor, and daughter-in-law, Sophie Winkleman (Lady Frederick Windsor), yesterday became the parents of a girl, who has received the names Maud Elizabeth Daphne Marina. Their daughter was born at the Ronald Reagan UCLA Medical Centre in Los Angeles, where Sophie Winkleman works as an actress.
The child will be fortieth in line to the British throne, although she is incorrectly listed as number 42 on the British royal website, which erroneously includes the sons of Lord Nicholas Windsor, Albert and Leopold Windsor (mistakenly referred to as Honourables, a style they do not hold), who were baptised as Catholics and are therefore not in line for the throne at the time of writing.
Maud Windsor will have no style or title other than Miss. In 1917, King George V restricted the title of Prince(ss) and the style of Royal Highness to children and male-line grandchildren of the monarch, as well as the eldest son of the eldest son of the Prince of Wales (in 2012 Queen Elizabeth II changed the last part to include all children of the eldest son of the Prince of Wales). However, so that children of a prince should not be born as plain Mr or Miss, it was decided that children of princes should be styled Lord/Lady Firstname Windsor, as are the children of dukes and marquesses. Grandchildren, on the other hand, receive no such titles (except for the eldest son of the eldest son of a prince who also has a peerage, who may use one of the subsidary titles as a courtesy title).