Multibillion-pound Westminster repairs could cost more than first estimated, commons clerk warns

David Natzler said there are "known unknowns" in the Houses of Parliament, which faces a growing risk of a "catastrophic event" unless ageing mechanical and electrical services are renovated.The proposals, which would have to be approved by Parliament and the Government, could see a temporary Commons chamber in the courtyard of the Department of Health's current offices in Whitehall, while the Lords would sit in the nearby Queen Elizabeth II conference centre.The Joint Committee on the Palace of