While there were "unique challenges" in work on a historic site, Parliament said it was disappointed at the rising bill and would launch a review.
"In advance of tendering contracts, the initial high level estimates were set at a lower level to avoid cost escalation from the market".
The fix effort caused controversy when it was announced that Big Ben would only chime on special occasions over the next four years while the works were being carried out.
"Of course we want to ensure that people are safe at work, but it can't be right for Big Ben to be silent for four years", she said to reporters. The name "Big Ben" comes from the 13.7-ton bell in the clock, which fell silent in August ahead of the four-year restoration project.
However, the total cost of the project to fix the Elizabeth tower - including fire safety work costs - is now an estimated £61m.
Football Moment that Left us Speech-Less.
With an 11- 0 score at the end of the game, Germany started the Shanghai Women’s World Cup with a world record win. Women’s World Cup 2007 Germanys women’s team opened the World Cup with a bang against Argentina.
PRESIDENTS CUP: Struggling Hideki benched for Foursomes
Bush and Barack Obama and almost cropped himself out of the photo. "I just love every opportunity to be a part of these events". Saturday will see four foursomes matches and four four-ball clashes as the International Team look to begin their comeback.
Harry, Obama, Biden attend Invictus Games
Eighteen-year-old Hayley Stover made many girls jealous by getting the seat next to Prince Harry at the Invictus Games in Toronto. This is the first time Harry has been pictured with Markle's mother, who is a yoga instructor and social worker and lives in LA.