Why the Tories shouldn't get excited about "good" economic news

The economy might appear to be improving but forecasters predict a "triple-dip recession" and rising unemployment.

This week's economic news has prompted hope among the Tories that the tide is finally turning in their favour. Employment is at a record high, inflation is down to 2.2 per cent, its lowest level since November 2009, and borrowing has fallen to its lowest level for four years. The positive trend will continue next week when the Office for National Statistics (ONS) announces that the economy finally returned to growth in the third quarter (the National Institute of Economic and Social Research, for instance, has predicted growth of 0.8 per cent). Team Osborne hope that all of this will allow them to tell a plausible story of recovery.

However, it's worth pointing out several inconvenient truths. First, the next set of growth figures will be artificially inflated by the bounce back from the extra bank holiday in the previous quarter (which reduced growth by an estimated 0.5 per cent) and by the inclusion of the Olympic ticket sales (which are expected to add around 0.2 per cent to GDP). So, if the ONS announces that the economy grew by 0.8 per cent in the third quarter, the underlying rate of growth will be just 0.1 per cent.

Worse, many expect the economy to contract in the fourth quarter (what our economics editor David Blanchflower has termed a "triple-dip recession"). Bank of England MPC member Martin Weale has warned: "The Jubilee depressed output in the second quarter so you get an automatic bounce back. But if we talk about underlying growth then I think the economy is flat. I certainly would not say there is no risk of [a triple-dip recession] happening." Martin Beck, UK economist at Capital Economics, told the Today programme last week: "we expect the economy to start contracting again in the fourth quarter."

On employment, the picture is similarly mixed. As I noted when the most recent figures were published on Wednesday, 59 per cent of the 212,000 jobs created in the last quarter are part-time and nearly half (101,000) are in London, suggesting that the labour market benefited from a temporary Olympics effect. Adequately paid, full-time employment is still remarkably hard to come by. Of the new jobs created over the last three months, one in three offer fewer than 15 hours week a work, while 54 per cent offer fewer than 30 hours. A near-record 1.4 million people are working part-time because they can't find full-time jobs. It's also worth noting that most forecasters expect unemployment to rise significantly next year as further spending cuts, a lack of growth and rising productivity restrict job creation. The CBI, for instance, predicts that unemployment will increase by nearly 200,000 to 2.7m.

Finally, the deficit. While September's figures were better-than-expected, borrowing so far this year remains £2.7bn (4.2 per cent) higher than in the same period last year and George Osborne is still expected to miss his annual target by £5-10bn. The Chancellor aims to borrow no more than £121bn this year, but in the first six months of 2012 he's borrowed £65.1bn. As a result, when he delivers his autumn statement on 5 December, Osborne will likely be forced to postpone his goal of eliminating the structural deficit (originally scheduled for 2015) for a third year - to 2018. Having once hoped to offer significant cuts in taxation at the next election, the Tories will only be able to promise yet more austerity.

Chancellor George Osborne speaks at the Conservative conference in Manchester earlier this month. Photograph: Getty Images.

George Eaton is political editor of the New Statesman.

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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.