HALF A CENTURY AFTER HIS LAST VICTIM, WHO WAS LONDON’S FORGOTTEN SERIAL KILLER?   By Chris Summers                                    12 September 2018 In September 1963 Gwynneth Rees, 22, a Welsh-born prostitute, was strangled and dumped, naked, on a rubbish dump in Mortlake, not far from the river Thames in south west London. When more sex workers went…