There is devilish detail in the new euro pact

Forget use of EU buildings, the threat is members of the new fiscal union cooking up deals that affe

The issue of David Cameron's "phantom" European veto has fallen out of the headlines pretty quickly, ousted from the agenda by the news of Fred Goodwin losing his Knighthood. (The announcement landed yesterday, by remarkable coincidence, within moments of the Prime Minister getting a bit duffed up in a Commons statement on Monday's European summit and after a weekend of bad headlines around banker bonuses.)

Conservative Eurosceptics, however, will not forget how the gesture of anti-Brussels defiance they so celebrated in December has turned, as they see it, into a supplicant bow to the forces of continental integration. It doesn't help that the Lib Dems are conspicuously pleased by Cameron's restoration of normal diplomatic service with regard to the EU.

As I wrote last week, upholding the spirit of the "veto" to the satisfaction of Tory back benchers and doing what it takes to secure British influence in European Union diplomacy were mutually exclusive demands. In fact, it seems, Cameron has done neither.

The sceptics have concentrated on the Prime Minister's failure to prevent signatories to the new Fiscal Union (FU) treaty using EU institutions to enforce their agreement. That was always a bizarre and unrealistic fixation. If Britain's position is to support other countries pursuing their plan, why would we sabotage the obvious mechanism for making it work. (There is an argument that says Britain should be opposing FU on the principle that any countries surrendering control of their budgets to a central European authority and insisting on choreographed austerity in the middle of a downturn is bonkers - but that is a different matter and definitely not government policy.)

The real issue for concern, as far as British influence is concerned, is not the use of institutions by the FU members, but the prospect that they will crowd the UK out in discussions of the single market. This is the problem that euro-wonks refer to as "caucusing" - the danger that plans will be hatched, positions agree, alliances cemented within the FU members that can then be presented at European Council meetings as faits accomplis.

This is not a threat for today or even tomorrow, but it is clearly a problem and potentially a very big one. If Britain struggles to build alliances in the Council it can get outvoted on things that matter deeply to our economy - on tax and regulation policy, for example. In the past, this hasn't happened too often, but the new FU structures, including regular summits (combined with some ill will generated by the whole "veto" episode) make caucusing much more likely.

Thus, as I have written before, the eurosceptic prophecy is self-fulfilling. Marginalisation diminishes influence leading to bad deals, suspicion of a conspiracy and more marginalisation. Onward towards the exit. Cameron told a press conference in Brussels that the government would "take action" if there was any sign of the FU members "encroaching on the single market". And that he would watch out for such encroachment "like a hawk". He didn't say what action would or could be taken.

The main safeguard in the draft fiscal union treaty appears to be in the preamble:

NOTING, in particular, the wish of the Contracting Parties to make more active use of enhanced cooperation, as provided for in Article 20 of the Treaty on European Union and in Articles 326 to 334 of the Treaty on the Functioning of the European Union, without undermining the internal market, as well as to make full recourse to measures specific to the Member States whose currency is the euro pursuant to Article 136 of the Treaty on the Functioning of the European Union, and to a procedure for the ex ante discussion and coordination among the Contracting Parties whose currency is the euro of all major economic policy reforms planned by them, with a view to benchmarking best practices.

Yes, I know that isn't even a sentence - such is the language of European treaties. Anyway, in something approximating English, this seems to be saying that the FU treaty is recognised as a special deal between some but not all existing EU member states - "enhanced cooperation" - for which a legal framework already exists in the much revised founding treaties of the EU.

The key passage on "enhanced cooperation" in the Treaty on the Functioning of the European Union says:

Such cooperation shall not undermine the internal market or economic, social and territorial cohesion. It shall not constitute a barrier to or discrimination in trade between Member States, nor shall it distort competition between them.

In other words, cooperation between FU members mustn't formally skew the single market against the non-FU members (Britain and the Czech Republic). In practice, however, some or all FU members could end up deciding on things that would subsequently be put to a full EU Council and comfortably outvote Britain.

To what extent this will happen and what Cameron could do about it are the real questions that should be asked about the changing nature of Britain's status within the EU after Monday.

Rafael Behr is political columnist at the Guardian and former 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.