the number of pages containing child pornography has more than doubled over the past year .
experts from the regulator removed more than 31,000 web pages featuring vile images of sexual abuse in 2014 , soaring 136 per cent from around 13,000 the previous year .
the iwf won the extra powers last year in the wake of the 2012 murders of tia sharp , 12 , and april jones , five .
they were part of a worrying rise in the amount of child abuse the iwf discovered online .