In 2018, the Offender Database recorded that 46-year-old kitchen porter Thomas De-Castle-Lynne—of Parsons Green, Hammersmith—was convicted of a violent assault and child grooming offences. St Albans Crown Court heard that De-Castle-Lynne traveled to Stevenage railway station, Hertfordshire, believing he was going to meet a 14-year-old girl named “Maddie Parker” for sex in a wooded area. Upon arrival, he was instead intercepted by the paedophile hunting group “Catching Online Predators.”
The investigation established that during the confrontation, a struggle ensued which resulted in De-Castle-Lynne biting the little finger of one of the group members. The prosecution reported that the defendant “clamped onto the finger with his teeth,” causing such excruciating pain and damage that the tip of the victim’s left little finger eventually had to be amputated. St Albans Crown Court heard that De-Castle-Lynne was simultaneously grooming three other “decoy” profiles managed by the same group.
Judicial Findings and Investigative Detail
The court reported that De-Castle-Lynne initially denied several charges but was convicted by a jury of attempting to meet a child under 16 following grooming and causing grievous bodily harm (GBH) with intent. The investigation established that during the trial, the defendant also changed his plea to guilty regarding a charge of causing racially aggravated harm or distress. The prosecution reported that digital evidence showed a clear and persistent pattern of predatory intent directed at multiple fictitious children.
Judge Michael Kay QC remanded De-Castle-Lynne in custody following the trial, with sentencing scheduled for 29 November 2018. For his actions in Stevenage and Hammersmith, he faced a significant custodial term reflecting both his predatory digital behaviour and the permanent physical injury inflicted upon the person who intercepted him. The judge noted that the transition from online grooming to physical violence at the meeting point identified De-Castle-Lynne as a high-risk individual requiring robust statutory oversight.
Status and Statutory Requirements
For the records reported in Hertfordshire and London, the status of Thomas De-Castle-Lynne as of April 8, 2026, was as follows:
- Custodial Status: RELEASED (Served custodial term; sentenced 2018; released on licence circa 2022-2023).
- Sex Offenders Register: Notification requirements are active for life.
- SHPO Status: Subject to a Sexual Harm Prevention Order (Including total prohibitions on unmonitored digital access and strict exclusion zones).
- DBS Status: Placed on the Barring List (Indefinite ban on working with children).
- Legal Status: CONVICTED (Attempting to meet a child following grooming; GBH with intent; Racially aggravated harassment).
- Judicial Oversight: Sentenced at St Albans Crown Court; evidence provided by Catching Online Predators; investigated by Hertfordshire Constabulary.
- Criminal Record: Traveled to Stevenage to meet a “14-year-old” for sex; Bit off a man’s fingertip during a struggle; Groomed four separate decoys simultaneously.
- Origin: Parsons Green, Hammersmith, West London.
Monitoring and Public Protection
De-Castle-Lynne is managed as a high-risk registered sex offender within the Hammersmith area following his release. Due to the nature of his conduct—specifically his “violent reaction” when confronted and his “simultaneous grooming” of multiple victims—his management is a priority for the Metropolitan Police Public Protection Unit. Authorities state that his conviction for racially aggravated harm, combined with the permanent disfigurement of a victim, identifies him as a volatile and dangerous offender who requires the highest tier of supervision.
As a registered sex offender for life, the defendant’s details are permanently logged on the national police database. Authorities state that his SHPO remains a critical tool for regulating his digital and physical movements, ensuring he has no opportunity to target minors or repeat his violent behaviour. Any change of residence in Hammersmith or elsewhere, any failure to report digital hardware, or any unauthorised proximity to children will result in immediate arrest to ensure the ongoing safety of the public from his demonstrated pattern of predatory and violent conduct.
QUESTION – Given that the offender bit off a victim’s fingertip while being apprehended for grooming, do you believe that “Violent Resistance” during a paedophile hunter confrontation should automatically double the baseline sentence for the underlying sex offence?
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