Watch: Time-lapse of BBC debate set being built

How long does it take to build a BBC TV election debate set?

Watch a time-lapse of the process taking place in Cambridge.

Labour's Jeremy Corbyn will join Conservative home secretary Amber Rudd, Lib Dem leader Tim Farron, SNP deputy leader Angus Robertson, UKIP's Paul Nuttall, Plaid Cymru's Leanne Wood and the Green party's Caroline Lucas for a televised debate eight days ahead of the general election.