PMQs review: Cameron’s sharp tongue runs wild

The Prime Minister launches attack after attack on Ed Miliband and Ed Balls.

David Cameron's new strategy director, Andrew Cooper, recently advised him to be "a national leader, rather than a party politician. Especially in the Commons." On the basis of today's PMQs, Cameron appears to have rejected that advice. He denounced Ed Miliband's weekend reference to the suffragettes as "nonsense", told one Labour MP: "I've no idea who you are", and described Ed Balls as "the most annoying person in modern politics".

Labour's Keynesian Rottweiler will have enjoyed that attack. It confirms that he has an unrivalled ability to infuriate the Tories.

The personal gibes began early on. After Cameron wished Miliband and his new fiancée a "long and happy life together", the Labour leader replied that he would ask the PM for "advice on stag nights", because he knows "how to organise a good one". To which the sharp-tongued Cameron responded, "When I was leader of the opposition I would have given anything for a honeymoon . . . he probably wishes he had, too."

The exchanges were memorable enough to overshadow some sharp questions from Miliband on tuition fees and police cuts.

Cameron was unable to tell the House how many universities so far plan to charge £9,000 a year (the answer is 18) and appeared not to know whether student numbers would be cut as a result of the £1bn black hole.

Instead, he made the irrelevant point that institutions will only be allowed to charge £9,000 if the Office for Fair Access approves. He shamelessly dodged the funding question.

Miliband also had the better of the exchanges on police cuts, with Cameron merely stating that there was "no reason why" there should be few officers. The PM in effect passed the buck and said that police numbers would not fall if local forces made greater efficiency savings. Cameron only managed to get the upper hand when he referred to the "ridiculous spectacle" of the Labour leader "marching against the cuts that his party caused".

It's also worth noting Cameron's comments on NHS funding. When the Labour MP Chris Leslie pointed out that higher inflation means the coalition is close to breaking its pledge to protect the health budget, Cameron simply replied: "We said we would increase health spending in real terms – and we will." In other words, spending will be raised to compensate for higher inflation. This is one promise that the PM intends to keep.

UPDATE: You can now watch footage of the Balls-Cameron clash above. (Hat-tip: Liar Politicians)

George Eaton is political editor of the New Statesman.

Getty
Show Hide image

Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.