Why Danny Alexander's promise to keep the 45p tax rate can't be trusted

The Lib Dems says the top tax rate will be cut "over my dead body". But he said the same about the 50p rate in 2011.

Danny Alexander's decision last week to attack Labour's "borrowing bombshell" (a conspicuous echo of Conservative rhetoric) and to outline coalition spending totals until 2020-21 went down predictably badly with the Lib Dem left. Just three days before his intervention, Vince Cable had emphasised that his party was not bound to George Osborne's post-2015 deficit reduction timetable: "There are different ways of finishing the job … not all require the pace and scale of cuts set out by the chancellor. And they could allow public spending to stabilise or grow in the next parliament, whilst still getting the debt burden down." But Alexander's willingness to join the Chancellor in a united front against Ed Balls appeared to confirmed the long-held suspicion that he has gone "native" at the Treasury (the joke runs that the Lib Dem man in the Treasury has become the Treasury man in the Lib Dems). 

In response, Prateek Buch, the co-chair of the Social Liberal Forum (and a Staggers contributor), said: "Cuts on the scale planned by Osborne just cannot be delivered. So why should Lib Dems endorse the Chancellor’s straitjacket? It is beyond me why Danny would sign up to what appears to be joint Lib Dem/Tory spending plans going beyond the end of the next parliament, when no such figures have been agreed by his own party. It is unhelpful to pre-empt the party’s manifesto process in this way. Besides, the plans take no account of the need to invest, or what will happen to GDP. What happened to differentiating ourselves from the Tories?"

Perhaps unsettled by this criticism, today finds Alexander seeking to put some clear yellow water between himself and his coalition partners. He tells the Daily Mirror that a cut in the 45p tax rate (which the Tories have repeatedly refused to rule out) will happen "over my dead body" and says of the claim that he has gone "native": "If that’s what people think about me, then they are wrong. I am Liberal Democrat – full stop, end of story." 

But given past form, don't be surprised if Osborne ends up walking over Alexander's corpse on his way to deliver the Budget. In July 2011, the Chief Secretary to the Treasury said of those calling for the abolition of the 50p tax rate: "The idea that we're going to somehow shift our focus to the wealthiest in the country at a time when everyone's under pressure is just in cloud cuckoo land". But eight months later, Osborne did just that (while failing to introduce the mansion tax that the Lib Dems demanded in return). While there is no sign that the Tories are considering another reduction in the top rate in this parliament (in what would be a pre-election gift to Labour), it would be unwise to take Alexander's word for it.

Asked about the subject on the Today programme this morning, Boris Johnson quipped that "the last thing I want to see is a pointless sacrifice from the Liberal Democrats, let alone the dead body of Danny Alexander" before hinting that the next Conservative manifesto would, at the very least, not commit to keeping the 45p rate. He said: "I can't believe we're going to go into an election with a tax rate so high." Since it's the Mayor's brother, Jo Johnson (the head of the No. 10 policy board) who is responsible for the manifesto, he can be assumed to speak with some authority on this matter. Finally, asked whether Alexander could be thrown over board to allow a cut in the top rate, he intriguingly remarked: "stranger things have happened at sea". 

Danny Alexander at the Liberal Democrat conference in Glasgow last year. 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.