Three deaths. One family. One quiet corner of South Croydon that suddenly found itself at the centre of a mystery that felt more like a Victorian thriller than the suburbs in the 1920s.

In this episode we dive into the strange chain of events that hit the Sidney and Duff families after three relatives died with the same unexplained symptoms, months apart. Doctors brushed it off, neighbours whispered, and life carried on. But once the Home Office ordered exhumations, everything changed. Each body showed clear signs of arsenic poisoning.

No intruder. No confession. No charges. Almost a century later, the Croydon Poisoning Mystery still sits in a very uncomfortable grey area.

We walk through the family tensions, the red flags and the unanswered questions — all sprinkled with our usual chaos, including the saga of the noise-cancelling headphones that turned Morrisons into sensory deprivation, whether stroking someone’s arm is science or just creepy, a full rant about eight-year-olds with teenage attitudes, and the ongoing diplomatic crisis caused by that comment about cheap suits.

Sources include:

https://beardyhistory.com/2025/08/10/unsolved-arsenic-murders-in-croydon
https://trove.nla.gov.au/newspaper/article/53486769#:~:text=,Croydon%20%28England
https://www.insidehook.com/adventure/hidden-venom-famous-unsolved-poisonings
https://beardyhistory.com/2025/08/10/unsolved-arsenic-murders-in-croydon
https://insidecroydon.com/2022/01/08/did-the-south-croydon-poisoner-really-get-away-with-murder/
https://historywiki.therai.org.uk/index.php?title=Edmund_Creighton_Duff
https://www.everand.com/book/897323633/Poisonous-Lies-The-Croydon-Arsenic-Mystery-Great-Unsolved-Murders-of-the-20th-Century
https://forum.casebook.org/forum/social-chat/other-mysteries/6176-the-croydon-poisonings

Support the show

Thanks for tuning in! If you loved diving into the dark corners of South London with us, don't forget to hit that subscribe button to never miss an episode of "Sinister South."

Also, follow us on Instagram @SinisterSouthPodcast for sneak peeks, behind-the-scenes content, and more cheeky banter, or www.sinistersouthpod.co.uk. Remember, every crime tells a story... and South is the best side of the river...

Produced and hosted by Hannah Williams & Rachel Baines
Mixed & edited by Purple Waves Sound (A.K.A Will)

This week we’re in Streatham, looking at one of the most significant and most debated cases in recent South London history: the shooting of 24 year old Chris Kaba. An unarmed man, a single police shot, and a city that still hasn’t shaken off the impact. We walk through who Chris was, the world he was moving through, the police intelligence that shaped that night, and the split second decision that changed everything. It’s a case full of contradictions, complexity and questions that don’t sit neatly on either side of a line.

And yes, before we get there, there’s also the usual chaos involving Rachel’s hatred of Sunday nights out, Hannah sniffing her own armpit, and an alarming amount of chat about shepherds. It’s Sinister South, Trevors. You know the drill.

Support the show

Thanks for tuning in! If you loved diving into the dark corners of South London with us, don't forget to hit that subscribe button to never miss an episode of "Sinister South."

Also, follow us on Instagram @SinisterSouthPodcast for sneak peeks, behind-the-scenes content, and more cheeky banter, or www.sinistersouthpod.co.uk. Remember, every crime tells a story... and South is the best side of the river...

Produced and hosted by Hannah Williams & Rachel Baines
Mixed & edited by Purple Waves Sound (A.K.A Will)

This week we’re diving into one of South London’s darkest and most infamous stories. The rise and fall of the Richardson Gang. A firm built on scrap metal, long-firm frauds, fruit machines, corrupt officers, brutal punishments and a level of violence that made even seasoned detectives say the Richardsons were far worse than the Krays.

We take you all the way from wartime Camberwell and the brothers’ chaotic childhood, through their early crimes, the building of the firm, the feud with the twins, the chaos at Mr Smith’s, the murder of George Cornell, the South Africa connection and the enormous police operation that followed. And of course, we walk through one of the most notorious trials the Old Bailey has ever seen – the Torture Trial – with its pliers, generators, witness protection deals and a judge whose own family history caused controversy for decades.

It’s one of the biggest stories we’ve ever covered. Brutal, complicated, and rooted deep in the real South London we know far too well.

But before all that, we've got the usual nonsense… Business as usual.

Support the show

Thanks for tuning in! If you loved diving into the dark corners of South London with us, don't forget to hit that subscribe button to never miss an episode of "Sinister South."

Also, follow us on Instagram @SinisterSouthPodcast for sneak peeks, behind-the-scenes content, and more cheeky banter, or www.sinistersouthpod.co.uk. Remember, every crime tells a story... and South is the best side of the river...

Produced and hosted by Hannah Williams & Rachel Baines
Mixed & edited by Purple Waves Sound (A.K.A Will)