Brit!Sarah is an Sueauthor on the Sueniverse. She is proud to say that she has been there from the beginning and wonders whether that explains her exam results ever since. Brit!Sarah is (unsurprising) British. This is good because... well it is but can also cause annoyances with timezones.
Sarah also goes by the name SJ- because,well she does.
Sarah also appears to hold a monopoly on the De Chagny family. (With the advent of Heloise, played by Emily, this is no longer the case.)