Guest director, Michael Rosen, will be in conversation with journalist Polly Toynbee about his role in this year's event.
It's also expected that the entire programme of events will be revealed in advance for the first time.
More top news
Anthony Bristowe who is registered blind is cycling in tandem from Land’s End to Bradford-on-Avon.
Analysis of queues found drivers faced 1.35 million traffic jams, costing them in wasted time, fuel and unnecessary carbon emissions.
Wednesday's forecast for the west of the region from Holly.