The pair will be acting as ghostbusters on the Welsh language TV show Ofn! (Fear!), a spine-tingling children’s series on S4C.

The series returns on Halloween, October 31, at 4.25pm to take a closer look at some of Wales’s most famous haunted houses. Ofn! features a number of historical locations all linked with ghosts, with past series having visited the Skirrid Inn near Abergavenny, Llancaiach Fawr near Caerphilly, Maes Artro, Harlech, Craig y Nos, Abercrave, Nant Eos, near Aberystwyth, Bodelwyddan Castle, Plas Teg near Mold and Beaumaris Gaol.

Each week a team of young researchers join presenters Branwen Gwyn and Rhodri Owen at a building where they use special technical equipment to explore the unknown.

At the stroke of midnight, a computer will choose one of the presenters and a member of the team to go into the building with cameras.

In a Christmas special of Ofn!, to be broadcast on December 19, BB7′s Welsh duo will venture into the unknown.

They will visit the 700-year-old medieval fortress of Chirk Castle and, with the help of pupils from Ysgol Morgan Llwyd, Wrexham, and two winners from an S4C magazine programme Uned 5 competition, will go on the trail of spooky sightings.

Popular stories:

• Daily news blog
• ‘Happy slap’ fears over attack
• Find bargains with StarBidz
• Fire hero boy saves sister
• New dad is just bowled over