Ymgyrch Seal Bay / Operation Seal Bay

Factual Series

2 x 60 mins, S4C

Broadcast: 4th and 5th November 2025

Ym 1983, daeth tref bysgota gysglyd yn Sir Benfro yn lleoliad annhebygol ar gyfer cynllwyn smyglo canabis rhyngwladol beiddgar gwerth miliynau. Mae'r stori'n dechrau pan mae ffermwyr a physgotwyr lleol Trefdraeth yn gwneud darganfyddiadau rhyfedd. Dynion mewn dillad rhyfedd yn crwydro dros dir fferm preifat ar ben clogwyni; offer morol drud a geir mewn cilfach na ellir ei chyrraedd ond mewn cwch, drws wedi'i guddio yng nghregyn traeth anghysbell arall, sy'n arwain at siambr danddaearol ryfedd. Pwy, beth a pham?

In 1983 a sleepy Pembrokeshire fishing town became the unlikely setting for an audacious international cannabis smuggling plot worth millions. The story begins when the local farmers and fisherman of Newport make a series of strange discoveries. Oddly dressed men traipsing over private clifftop farmland. expensive marine equipment found at a cove only accessible by boat, and a hatch hidden in the shingle of another remote beach, which leads to a strange underground chamber. Who built it? And why?

gwyliwch yma / watch here