The RTS Nations and Regions Big Christmas Telly Quiz, broadcast on the RTS YouTube Channel, was hosted by impressionist Darren Altman and celebrated 100 years of the BBC.

All questions were about the Beeb and, reflecting its Reithian origins, were in three categories: educate, inform and entertain. STV presenter Chris Harvey was one of a number of question masters.

The RTS North East and the Border quiz was hosted by TV presenter Chris Jackson amid the Art Deco surroundings of the Tyneside Cinema in Newcastle.

Devilishly difficult rounds included one on theme tunes, which tested the ears of the teams to recognise classics from across the decades, such as Peaky Blinders and Tales of the Unexpected. The winning team was Planet North.

Cymru Wales Chair Ed Russell hosted his centre’s quiz at Tramshed Tech in Cardiff. “It was an absolute blast. We had questions for all generations, originating from the dark depths of my own knowledge, which is quite geeky,” he said.

“No one remembered the original telephone number for Swap Shop, but we did have quite a few correct answers about British sitcoms over the years. I was particularly impressed by the person who remembered that the perfumery department was on the ground floor of Grace Brothers in Are You Being Served?”