At midnight on the 31st of December 1999, a piece of music began to play in the lighthouse at Trinity Buoy Wharf in London's docklands, a piece of music which is still unfolding today, and which is due to continue for another 987 years.

Composed by Jem Finer, a musician who came to prominence with the Pogues, it was designed for singing bowls – an ancient form of standing bell – and will play for 1,000 years without ever repeating itself.

Each year, Artangel, which commissioned the work, invites two cultural thinkers to discuss some of the issues that arise from the project – what it says about our current realities and future possibilities.

This year's conversation is between Caitlin Moran and John Lanchester, and we will be live streaming it exclusively on Guardian books from the Royal Instistute of British Architects on Monday 3 December 2012 from 7pm. But will you be around long enough to watch?