Guido brings you an update on the radical design for a floating temporary parliament during renovation work at Westminster. Gensler, the firm vying for a £160 million contract to build the structure have revealed images showing inside the slug. The Commons and Lords chambers would be exactly the same dimensions as their original but it would house a different Royal Gallery and Central Lobby.

The building would allow parliament to be renovated in only six years without working around politicians – the “full decant” option. It could be built in time for the vote on the third runway to be held within…