Across the Line at 30 charts the history of the long-running music show which has championed new music in Northern Ireland for 30 years. It will be broadcast on Monday, December 12 on BBC One.

Narrated by Colin Murray, the film features fresh interviews with some of rock and roll's biggest names sharing their memories of the programme and how it helped define the sound of Northern Ireland over four decades.

Interviewees will include Neil Hannon from Divine Comedy, Therapy?, The 4 Of Us and Ash.

The programme also talks to Mike Edgar, original presenter and long-time producer, alongside the team that led the way towards the show's successful longevity - including Davy Sims, Donna Legge, Barry McIlheney, Mary Carson, Paul McClean, and the programme's current presenters Rigsy and Stuart Bailie.

The programme was BBC Northern Ireland's first weekly network radio programme championing new music from Northern Ireland. Indeed the programme had many firsts in that it was the first programme in Northern Ireland to stereo simulcast live concerts on television and radio; the first programme to broadcast concerts from Northern Ireland visually on the internet and radio; and as the world moved into the digital era, the programme even played the first compact disc to be heard on the BBC Radio Ulster airwaves in Northern Ireland.

The programme is widely credited for its friendship and support in the early days of Ash, Snow Patrol, Divine Comedy, The Four of Us, Therapy?, Hothouse Flowers, Two Door Cinema Club and many more.

Watch the preview for the documentry here: