Simplify the following text for a Grade 11 native English-speaking person.
Original: Located in within of Westminster Abbey in central London , and with a history going back before the 12th century , the school 's notable ex-students include Ben Jonson , Robert Hooke , Christopher Wren , Jeremy Bentham , and A. A. Milne .
Simplified: Standing in the precincts of Westminster Abbey in central London , and with a history stretching back to the 11th century , the school 's notable alumni include Ben Jonson , Robert Hooke , Christopher Wren , John Locke , Jeremy Bentham , Edward Gibbon , A.A. Milne and Nick Clegg .