Police are asking any witnesses, or anyone who may have information about the attack on the 13-year-old girl to contact them. The victim was raped at around 9pm on Saturday, 30 November.
Anyone with information is asked to call Crimestoppers anonymously on 0800 555 111.
More top news
Angela Millington's remains were discovered by ramblers near Southend in Essex in 2014.
Angela Kelly and her daughters, 12-year-old Shanti Harbourne, and Maya-Rose Kelly-Johnson, five, were last seen in Camberley, Surrey.
Voters in part of London have reportedly been turned away from polling booths due to "problems with the lists".