Timeline: Vanessa George abuse

George was convicted in December 2009

A serious case review into the child abuse at Little Ted's nursery by Vanessa George, which led to her conviction, and those of four other people, has been published.

September 2006: George begins working at Little Ted's nursery in Plymouth.

Autumn 2008: IT worker Colin Blanchard, who had spent five years on the sex offenders register after receiving a police caution for possession of indecent images of children, establishes contact with George and Angela Allen.

April 2009: George is introduced to Allen by Blanchard.

5 June: Blanchard's IT business partner accidentally finds indecent images of very young children on his laptop.

6 June: Blanchard is arrested at Manchester Airport. His computers are seized and his house searched.

8 June: Devon and Cornwall Police arrive at George's house at midnight, seize her computer and mobile, and take her into custody after she is identified from Blanchard's computers and interviews.

9 June: Little Ted's nursery where George worked is shut. Blanchard appears at Trafford Magistrates' Court charged with possessing indecent images.

11 June: George appears before Plymouth Magistrates' Court, facing several charges of sexual assault and making, possessing and distributing indecent images of children. Parents jeer and spit at her from the packed public gallery.

16 June: Allen, from Nottingham, is identified by Greater Manchester Police and arrested by Nottinghamshire Police.

20 June: Allen appears at Nottingham Magistrates' Court charged with several counts of sexual assault and indecent images offences.

30 June: Images on Blanchard's computer show him sexually abusing children. He is charged with more offences.

27 July: Allen and George appear at Bristol Crown Court, and the three defendants' cases are formally linked. Blanchard does not appear.

1 October: George, Allen and Blanchard meet face to face for the first time when they appear at Bristol Crown Court and plead guilty to a string of charges of sexual assault and making and possessing indecent images. They met on social networking site Facebook and exchanged images via e-mail and phones.

10 October: Tracy Lyons, a mother of nine, appears before Portsmouth Magistrates' Court charged with six charges of sexually assaulting a two-year-old boy, engaging a child in a sex act and distributing indecent images of children.

17 November: Tracy Dawber, a care worker of Southport, Merseyside, is arrested when police investigating Blanchard find photographs he had taken of her abusing a child. Dawber was the only one of the four women who met Blanchard, and engaged in a sexual affair with him.

15 December: George and Allen receive indeterminate prison sentences. George will serve a minimum of seven years in jail while Allen must serve five years.

5 March 2010: Lyons admits six charges of sexually assaulting a two-year-old boy, engaging a child in a sex act and distributing indecent images of children.

5 July: Dawber goes on trial at Bristol Crown Court accused of one count of sexually assaulting a child and five counts of permitting indecent photographs of a child to be taken.

14 July: Jury discharged after failing to reach a verdict on Dawber. A retrial is ordered.

18 October: Dawber convicted. She, Lyons and Blanchard have yet to be sentenced.

4 November: Serious Case Review into what happened at Little Ted's Nursery is published, concluding that it "provided an ideal environment" for George to abuse.