One man gets a five-year ban and two others are to appear in court after a video circulated online.
Officers were told not to act after seeing the boy enter the gangland figure’s house, a watchdog says.
London Fire Brigade says it has received more than 70 emergency calls about the blaze.
Harry disappeared from his home in Ipswich in 2008 but turned up at the Blue Cross last month.
Dilan Amin was jailed for 12 years for “preying on young girls” who visited his shop.