Yes this vile scumbag has been on the loose for many years now. I even heard about this when I was living in west london and it was on crimewatch some years back. I live in HOP now and a few months ago plain clothed policemen come to my home to ask questions about the neighbours, who they are, can I describe them, had I seen anything strange / or anyone acting odd etc. I think this door to door activity was indeed part of this investigation to see if they could identify any possible suspects. They seem to be centering this investigation now around SE23 - they must have something to go on, even if it is a tenuous link so lets just hope they catch him before he strikes again attacking poor defenceless old folk.