In 2019, the Offender Database recorded that Allan Malcolm Dyche, then 67, of Peel Street, Abergele, Conwy, was sentenced to a significant term of imprisonment for a decade of historical sexual atrocities. On Saturday, 4 May 2019, Dyche appeared at Caernarfon Crown Court, where he was handed a 23-year custodial sentence following his conviction on 18 counts of historical sexual offences, including rape.
The investigation established that Dyche, a known hoarder who had previously been prosecuted for illegally collecting wild birds’ eggs, kept a “memory box” in his bedside drawer containing mementoes of his predatory activities. This box proved to be a “key piece” of evidence; during his arrest in 2017, police discovered intimate hair within the collection that provided a DNA match to one of his victims. The court heard that this box illustrated his “overwhelming perversion” and deep-seated interest in the abuse of children.
Judicial Findings and Investigative Detail
The court reported that Dyche’s “appalling behaviour” had spanned at least a decade, ruining the lives of multiple survivors. Caernarfon Crown Court heard victim impact statements describing a lifetime of painful, unhappy memories and a desire to “die inside” due to the secrets they were forced to keep. Judge Huw Rees noted that the forensic evidence found in the memory box was sickening and served as a permanent reminder of the defendant’s “deeply perverted” nature in Abergele.
The judge noted that despite the defendant’s age and health ailments, a sentence of 23 years was the only appropriate response for the scale of the trauma inflicted. For his actions in Abergele, Conwy, Dyche was identified as a prolific predator whose outward character masked years of systematic abuse. The prosecution, led by Anna Pope, emphasised that the discovery of the memory mementoes was the decisive factor in securing the historical counts’ convictions.
Sentence and Statutory Requirements
For his crimes in Wales, Allan Malcolm Dyche was handed:
- Custodial Sentence: 23 years in prison.
- Sex Offenders Register: Notification requirements are in effect for life.
- SHPO: A Sexual Harm Prevention Order (SHPO).
- Restraining Order: A permanent order to protect the survivors.
- Judicial Oversight: Sentenced at Caernarfon Crown Court following a jury trial.
Monitoring and Public Protection
Dyche is managed under Multi-Agency Public Protection Arrangements (MAPPA) by North Wales Police and the prison estate. Due to the nature of the “appalling” behaviour in Abergele, Conwy, and the extreme risk demonstrated by his “memory box” of mementoes, his management is subject to the highest level of oversight by the Public Protection Unit.
As a member of the Sex Offenders Register, Dyche must comply with notification requirements regarding any future residence in Abergele, Conwy, for the rest of his life. Authorities state that his history as a hoarder of “vile mementoes” necessitates permanent and intense scrutiny of his possessions and surroundings. Any breach of his registration conditions or future licence terms will result in immediate arrest and a return to Caernarfon Crown Court.
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.

