In 2020, 31-year-old Lee Calder—of Peterborough Road, Whittlesey—was sentenced to 19 years of custody following a “vile” and “monstrous” serial of sexual strikes against children. The investigation established that Calder operated alongside her partner, Guy Delph, and his uncle, Kieran Burton, in a coordinated predatory strike against five young girls. The prosecution reported at Peterborough Crown Court that Calder admitted 14 offences, including seven counts of sexual assault by penetration and inciting child prostitution, identifying a total abandonment of human decency.
The investigation established that the serial abuse was uncovered in 2018 after Norfolk police tracked Burton for uploading indecent images to an internet messaging platform. A subsequent police strike across Cambridgeshire and Norfolk led to the seizure of 85 electronic devices containing tens of thousands of “disgusting” images. The prosecution reported that many of these recordings depicted Calder and Delph actively participating in the physical strikes against children as young as one year old, while Burton possessed a “paedophile manual” to guide their serial predatory behaviour.
COORDINATED ABUSE AND JUDICIAL SENTENCING
The court reported that the three adults shared a “mutual interest” in child sexual abuse media and coordinated their strikes over several years. The investigation established that Delph, of Downham Market, was sentenced to life in prison, while Burton received a 13-year term for his serial of digital and physical strikes, including the production of over 35,000 indecent images. The prosecution reported that the victims were subjected to a “vile” serial of rape, prostitution, and pornography, with one child being abused from the day she was born.
Judge-led proceedings at Peterborough Crown Court concluded on July 23, 2020. For her actions in Whittlesey and the nature of the serial child sexual abuse investigation reported, Lee Calder was sentenced to 19 years in custody, to be spread between a secure hospital and jail. The investigation established that all three perpetrators were legally mandated to the Sex Offenders Register FOR LIFE and handed lifelong Sexual Harm Prevention Orders (SHPO) to protect the life-safety of children.
STATUS AND STATUTORY REQUIREMENTS (2020)
Based on judicial and Cambridgeshire Constabulary records as of 2020:
- Legal Status: CONVICTED (Assault by penetration x7; Inciting child prostitution x3; Inciting sexual activity x4).
- Custodial Status: JAILED (In 2020, serving 19 years via a hybrid hospital/prison order).
- Accomplices: Guy Delph (Jailed for life); Kieran Burton (Jailed for 13 years).
- Forensic Profile: 85 devices seized; 35,000+ images recovered; “Paedophile manual” found.
- Sex Offenders Register: Notification requirements are active FOR LIFE.
- DBS Status: Placed on the Barred List (Indefinite and permanent ban from any role involving children or regulated activity).
- Judicial Oversight: Sentenced at Peterborough Crown Court; investigated by Cambridgeshire and Norfolk Constabularies.
- Criminal Record: Serial child predator; Facilitated child prostitution; Targeted infants; Struck in a coordinated gang; Jailed in 2020.
- Origin: Peterborough Road, Whittlesey, Cambridgeshire.
MONITORING AND PUBLIC PROTECTION
In 2020, Calder is managed as a maximum-risk dangerous predator under the statutory requirements of the Multi-Agency Public Protection Arrangements (MAPPA) in Cambridgeshire. Due to the nature of her behaviour—specifically her serial involvement in a predatory gang and the “exceptionally depraved” production of abuse media featuring herself—she is a priority for high-security detention. Authorities reported that the 2020 conviction identifies Calder as a predator who prioritised her own perverted gratification over the principles of human decency and the life-safety of infants.
As a registered sex offender for life, her details are permanently logged on the national police database to prevent future strikes. Authorities stated that Calder’s behaviour identifies an individual who demonstrated a serial commitment to child sexual abuse and exploitation. Any future attempt to strike against her notification requirements or bypass her lifelong SHPO results in immediate police intervention to ensure the ongoing protection of the community from a woman who used a “partner and mother” mask to hide her predatory serial strikes.
QUESTION – Given that the group utilized a “Paedophile Manual” to coordinate their serial strikes over several years, do you believe the law should legally mandate that the “Possession of Pedagogical Abuse Material” should carry an “Automatic Life Sentence” to stop predators before they can strike a child?
If you or anyone you know has been affected by the individuals highlighted on this website, please report them to the Police on 101 (999 in an emergency) or visit their online resources for further details on reporting a crime. You can also report to Crimestoppers if you wish to remain completely anonymous. There is help available on our support links page.

