The Lib Dems are now in danger of excessive optimism

Even on a generous reading, the party is still on course to lose nearly half of its 57 seats.

They're trailing UKIP in the polls and rarely score above 10 points. They've lost a third of their members since 2010 (down from 65,038 to 42,501) and more than a thousand of their hard-won councillors. They ran a deficit of £410,951 last year and are struggling to raise the funds required to fight an adequate general election campaign. So why, ahead of the opening of their conference in Glasgow tomorrow, are the Lib Dems so cheerful?

The first reason is that the next election appears increasingly likely to result in another hung parliament. While the party could yet face a wounding left-right split if forced to choose between the Tories and Labour (both of whom could conceivably win enough seats to form a majority government with Lib Dem support), the thought of again holding the balance of power and negotiating concessions (proportional representation for local government!) is an intoxicating one.

The second is that the party believes both that a significant number of its 2010 supporters will return to the fold before 2015 and that it is performing better than the headline figures suggest. Were the results of the latest YouGov poll (which has them on 8 per cent) replicated on a uniform swing, the Lib Dems would retain just 17 of their 57 seats. But as the party's activists rejoice in pointing out, their vote is holding up, and even improving, in their heartlands. The Eastleigh by-election, which the party won comfortably in the most adverse circumstances (recall the misdemeanours of the two Chris's: Huhne and Rennard), is offered as ultimate proof that they are not heading for electoral apocalypse. Where the party is well organised and where it can appeal for tactical votes from Labour supporters (the Tories are in second place in 37 of the 57 Lib Dem seats), it can still win. It is this faith that explains why those calling for Nick Clegg's head are still limited to maverick non-MPs such as Lembit Opik and Lord Oakeshott. 

But if they were once suffering from an excess of pessimism, many Lib Dems now appear overly optimistic. Even if their vote share rises to 15% before 2015, the laws of arithmetic mean they cannot expect to win many more than 30 seats. The party's intention to fight the next election as "57 Eastleighs" ignores the fact that this simply isn't possible. While the Lib Dems were able to pour thousands of activists and cabinet ministers into the constituency, they won't be able to do so when fighting on 56 other fronts at the same time. After decades of advancement, the party is still on course for its worst performance since 1992, losing around half of its seats. If it isn't dreading the evening of 7 May 2015, it really should be. 

Nick Clegg leaves Number 10 Downing Street to attend Prime Minister's Questions. Photograph: Getty Images.

George Eaton is political editor of the New Statesman.

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The deafening killer - why noise will be the next great pollution scandal

A growing body of evidence shows that noise can have serious health impacts too. 

Our cities are being poisoned by a toxin that surrounds us day and night. It eats away at our brains, hurts our hearts, clutches at our sleep, and gnaws at the quality of our daily lives.

Hardly a silent killer, it gets short shrift compared to the well-publicised terrors of air pollution and sugars food. It is the dull, thumping, stultifying drum-beat of perpetual noise.

The score that accompanies city life is brutal and constant. It disrupts the everyday: The coffee break ruined by the screech of a line of double decker buses braking at the lights. The lawyer’s conference call broken by drilling as she makes her way to the office. The writer’s struggle to find a quiet corner to pen his latest article.

For city-dwellers, it’s all-consuming and impossible to avoid. Construction, traffic, the whirring of machinery, the neighbour’s stereo. Even at home, the beeps and buzzes made by washing machines, fridges, and phones all serve to distract and unsettle.

But the never-ending noisiness of city life is far more than a problem of aesthetics. A growing body of evidence shows that noise can have serious health impacts too. Recent studies have linked noise pollution to hearing loss, sleep deprivation, hypertension, heart disease, brain development, and even increased risk of dementia.

One research team compared families living on different stories of the same building in Manhattan to isolate the impact of noise on health and education. They found children in lower, noisier floors were worse at reading than their higher-up peers, an effect that was most pronounced for children who had lived in the building for longest.

Those studies have been replicated for the impact of aircraft noise with similar results. Not only does noise cause higher blood pressure and worsens quality of sleep, it also stymies pupils trying to concentrate in class.

As with many forms of pollution, the poorest are typically the hardest hit. The worst-off in any city often live by busy roads in poorly-insulated houses or flats, cheek by jowl with packed-in neighbours.

The US Department of Transport recently mapped road and aircraft noise across the United States. Predictably, the loudest areas overlapped with some of the country’s most deprived. Those included the south side of Atlanta and the lowest-income areas of LA and Seattle.

Yet as noise pollution grows in line with road and air traffic and rising urban density, public policy has turned a blind eye.

Council noise response services, formally a 24-hour defence against neighbourly disputes, have fallen victim to local government cuts. Decisions on airport expansion and road development pay scant regard to their audible impact. Political platforms remain silent on the loudest poison.

This is odd at a time when we have never had more tools at our disposal to deal with the issue. Electric Vehicles are practically noise-less, yet noise rarely features in the arguments for their adoption. Just replacing today’s bus fleet would transform city centres; doing the same for taxis and trucks would amount to a revolution.

Vehicles are just the start. Millions were spent on a programme of “Warm Homes”; what about “Quiet Homes”? How did we value the noise impact in the decision to build a third runway at Heathrow, and how do we compensate people now that it’s going ahead?

Construction is a major driver of decibels. Should builders compensate “noise victims” for over-drilling? Or could regulation push equipment manufacturers to find new ways to dampen the sound of their kit?

Of course, none of this addresses the noise pollution we impose on ourselves. The bars and clubs we choose to visit or the music we stick in our ears. Whether pumping dance tracks in spin classes or indie rock in trendy coffee shops, people’s desire to compensate for bad noise out there by playing louder noise in here is hard to control for.

The Clean Air Act of 1956 heralded a new era of city life, one where smog and grime gave way to clear skies and clearer lungs. That fight still goes on today.

But some day, we will turn our attention to our clogged-up airwaves. The decibels will fall. #Twitter will give way to twitter. And every now and again, as we step from our homes into city life, we may just hear the sweetest sound of all. Silence.

Adam Swersky is a councillor in Harrow and is cabinet member for finance. He writes in a personal capacity.