Perdita Lee may appear your average British schoolgirl; Harriet Lee may seem just a working mother trying to penetrate the school social hierarchy; but there are signs that they might not be as normal as they think they are. For one thing, they share a gold-painted, seventh-floor flat with some surprisingly verbal vegetation. And then there?s the gingerbread they make. Londoners may find themselves able to take or leave it, but it?s very popular in...