Guy Ritchie series filmed at Wales cathedral

A new TV series directed by Guy Ritchie was filmed across Wales, including a "dramatic scene" at one of the country's best-known religious buildings.

Young Sherlock, a re-imagined origin story of Sir Arthur Conan's Doyle famous detective, had scenes filmed over several days at Llandaff Cathedral, which was transformed into the Victorian area for the series.

Other filming locations included Monmouth, Margam Park in Port Talbot and Merthyr Mawr, Bridgend.

The Dean of Llandaff, Jason Bray, said they were "thrilled" to share the cathedral with a "worldwide audience".

"It's a really atmospheric place, one of Wales' greatest buildings, fusing ancient and modern architecture," said Bray.

The filming, which took place in January 2025, saw the cathedral closed for four days to the public.

A spokesperson for the cathedral said they had been approached by a location manager with the opportunity to be part of "the largest production filmed in Wales".

The cathedral, on the outskirts of Cardiff, accommodated a crew of "close to 100 people" and a significant amount of work was done to "transform" it into the Victorian area.

There was "a real buzz around Llandaff" during the filming, the spokesperson said, adding that a "dramatic scene" was filmed there that is featured in episode three.

Set in 19th Century England, France and Turkey, much of the filming of the series took place in Wales, as well as Oxford and south-west England.

Merthyr Mawr estate in Bridgend was used as the Holmes' English estate, with filming also taking place in the market town of Monmouth and at Margam Park, near Port Talbot.

Bannau Brycheiniog, also known as the Brecon Beacons, provided the backdrop for a Chinese village in a flashback scene.

Hero Fiennes Tiffin plays the famous detective in his younger years, while Colin Firth plays Sir Bucephalus Hodge, the dean of Oxford University, where Holmes is a porter.

The eight-episode series is Ritchie's second time bringing the detective to life on-screen, after directing the 2009 film Sherlock Holmes, starring Robert Downey Jr.