Jon Ruben, 76, was sentenced to an extended sentence of more than 31 years at Leicester Crown Court after previously admitting offences including wilful ill treatment of eight children and possession of class C drugs following a police investigation which Senior Investigating Officer, Temporary Detective Chief Inspector Neil Holden described as “horrific, complex and emotional”.

The sentence incorporates a 23 years and 10 months custodial sentence with an additional extended licence period of eight years.

Ruben, of Wayte Court, Landmere Lane, Ruddington, Nottingham, also previously admitted sexual offences against two children and charges of possession of indecent images of children. None of the images concerned relate to children who were at the summer camp.

Earlier this week, he also admitted administering a poison/noxious substance to an adult victim with intent at the camp.

“Our focus must remain on the victims and their families who have shown immense bravery as they have found out the truth about what happened. It is their courage and their dignity which has undoubtedly helped us in uncovering Ruben’s crimes.”