The camp had its registration suspended by education watchdog Ofsted, on 6 August
Three more people have been charged following the closure of a US-style children's camp in Hertfordshire, police said.
Two men and a woman were detained on Thursday by a specialist Joint Child Protection Investigation Unit.
It follows the closure of LL Camps, based at St Margaret's School, Merry Hill, Borehamwood, last month.
Camp director Ben Lewis was charged in connection with possessing indecent images of children, in August.
The latest arrests include camp co-founder, Tal Landsman, 25, of Admiral Drive in Stevenage, who has been charged with conspiracy to cause cruelty to a child and conspiracy to pervert the course of justice.
'Significant progress'
Adrianne Landsman, 56, of Gresham Road, Edgware, is accused of conspiracy to wilfully neglect children so as to expose them to risk of harm.
Larry Lewis, 55, of Lullington Garth, Borehamwood is accused of conspiracy to pervert the course of justice.
Hertfordshire Police said all three have been released on bail and are due to appear at St Albans Magistrates' Court in October.
LL Camps director, Mr Lewis, 25, of Lullington Garth, Borehamwood, is accused of three offences in connection with indecent images of children.
The camp had its registration suspended by education watchdog Ofsted on 6 August.
Det Ch Insp Dave Newsome said: "We fully understand that parents and professionals will be concerned due to the nature of the investigation, but we are making significant progress to determine the full facts of what remains a complex investigation."
