I don't understand how someone can just vanish from outside King's Cross. All that activity and cctv.
My thoughts are police thought he was just "another runaway", would be back in a few days, didn't bother to look (local shops cctv) and when they finally bothered to it was too late (cctv deleted)
I lived in that area very briefly years ago and it's busy almost 24/7. I never looked for cameras but there must have been a trillion.
Andrew being still missing is IMO police fault for not taking his disappearance seriously because there would have been a LOAD of cctv and 1st hand witnesses on the day he was there, IMO.
They just weren't assed to care for this boy.
My guess is he went into a (taxi) cab. That's the only way to 100% not get noticed outside King's Cross or other London stations, no matter your age, looks etc.
Just JMO...