The price of tidal power

When did it become OK to save our wildlife at the expense of everyone else’s?

There’s no joy in it but it’s got to be done. We have to press ahead with harvesting the tidal energy of the River Severn, despite the havoc it is likely to wreak on local wildlife, because these days there is no such thing as local wildlife.

When we talk about living in a globalised world, we don’t usually think about nations sharing wildlife. But we are now getting other people’s fish. Bluefin tuna and anchovies are increasingly common in British waters and no doubt we’ll be getting into fights with foreign fishing fleets about them soon. Elsewhere, species of Japanese coral are migrating northwards. A few weeks ago, Australian scientists issued a report into the ocean biodiversity in their region. Rather shockingly, their tropical fish are moving away – those that aren’t dying off in the rapidly warming water are migrating southwards, following the plankton that are being carried on currents that are rising in strength.

You won’t be surprised to hear that the blame for all this flux lies with global warming. Rising temperatures leave the inhabitants of the ocean no choice but to embrace change. Paradoxically, though, taking measures to combat global warming – such as building the Severn barrage to reduce our dependence on fossil fuels – will also force changes on the natural world. It’s now a question of whether we value our creatures more than everyone else’s.

The Severn provides Britain with a golden opportunity to exploit lunar power. The moon’s pull causes earth’s water to bulge out from the surface and the geometry of the Severn creates a bigger bulge than most. The difference between its high and low tide is the second largest in the world; only Canada’s Bay of Fundy can beat the Severn’s 14-metre pile of water.

Hold that heap of water back until just the right moment and the resulting torrent on release is a renewable source of energy. A Severn barrage would provide enough lunar electricity to power 5 per cent of Britain’s homes, equivalent to three nuclear or gas-fuelled power stations. It would also last three times longer – at least. According to projections, the barrage could operate for over a century, compared to the few decades of lifetime offered by a nuclear plant.

A cross-party group of MPs is backing a campaign for the barrage to be built and David Cameron has recently instructed the Energy Secretary, Ed Davey, to look at the proposal. It still might not take off, however. That is because, from a local perspective, it will be an environmental tragedy.

As with any hydroelectric project, holding back the water floods areas that would usually be dry. In the case of the Severn barrage, many of those areas are mudflats designated as sites of special scientific interest: feeding grounds for important bird species. It’s also worth mentioning that forcing the water through electricity-generating turbines at high pressure cannot help but hurt fish populations, too.

No pain, no gain

The consortium looking to build the barrage has come up with a design that, it claims, reduces mudflat loss by 60 per cent and operates at lower pressures, easing the toll on the Severn’s fish. Perhaps there are other mitigation efforts that can be made, such as constructing artificial mudflats at the water’s new edge. Either way, it is hard to see how we can justify holding back the barrage now. We will have to sacrifice some of our cherished natural environment.

As far as carbon-free, sustainable energy generation goes, this is the low-hanging fruit. If we don’t grab it, our continued emissions will have a similar, maybe greater, impact on biodiversity in other places. Yes, it will hurt but when did it become OK to save our wildlife at the expense of everyone else’s?

 

Surfers ride the Severn Bore along the River Severn. Photograph: Getty Images

Michael Brooks holds a PhD in quantum physics. He writes a weekly science column for the New Statesman, and his most recent book is At the Edge of Uncertainty: 11 Discoveries Taking Science by Surprise.

Photo: Getty
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Labour's trajectory points to landslide defeat, but don't bet on a change at the top any time soon

The settled will among Jeremy Corbyn's critics that they need to keep quiet is unlikely to be disrupted by the result. 

Labour were able to tread water against Ukip in Stoke but sank beneath the waves in Copeland, where the Conservatives’ Trudy Harrison won the seat.

In Stoke, a two-point swing away from Labour to the Tories and to Ukip, which if replicated across the country at a general election would mean 15 Conservative gains and would give Theresa May a parliamentary majority of 40.

And in Copeland, a 6.7 per cent swing for Labour to Tory that would see the Conservatives pick up 52 seats from Labour if replicated across the country, giving them a majority of 114.
As the usual trend is for the opposition to decline from its midterm position at a general election, these are not results that indicate Labour will be back in power after the next election.. That holds for Stoke as much as for Copeland.

The last time a governing party won a by-election was 1982 – the overture to a landslide victory. It’s the biggest by-election increase in the vote share of a governing party since 1966 – the prelude to an election in which Harold Wilson increased his majority from 4 to 96.

To put the length of Labour’s dominance in Copeland into perspective: the new Conservative MP was born in 1976. The last Conservative to sit for Copeland, William Nunn, was born in 1879.

It’s a chastening set of results for Ukip, too. The question for them: if they can’t win when Labour is in such difficulties, when will they?

It’s worth noting, too, that whereas in the last parliament, Labour consistently underperformed its poll rating in local elections and by-elections, indicating that the polls were wrong, so far, the results have been in keeping with what the polls suggest. They are understating the Liberal Democrats a little, which is what you’d expect at this stage in the parliament. So anyone looking for comfort in the idea that the polls will be wrong again is going to look a long time. 

Instead, every election and every poll – including the two council elections last night – point in the same direction: the Conservatives have fixed their Ukip problem but acquired a Liberal Democrat one. Labour haven’t fixed their Ukip problem but they’ve acquired a Liberal Democrat one to match.

But that’s just the electoral reality. What about the struggle for political control inside the Labour party?

As I note in my column this week, the settled view of the bulk of Corbyn’s internal critics is that they need to keep quiet and carry on, to let Corbyn fail on its his own terms. That Labour won Stoke but lost Copeland means that consensus is likely to hold.

The group to watch are Labour MPs in what you might call “the 5000 club” – that is, MPs with majorities around the 5000 mark. An outbreak of panic in that group would mean that we were once again on course for a possible leadership bid.

But they will reassure themselves that this result suggests that their interests are better served by keeping quiet at Westminster and pointing at potholes in their constituencies.  After all, Corbyn doesn’t have a long history of opposition to the major employer in their seats.

The other thing to watch from last night: the well-advertised difficulties of the local hospital in West Cumberland were an inadequate defence for Labour in Copeland. Distrust with Labour in the nuclear industry may mean a bigger turnout than we expect from workers in the nuclear industries in the battle to lead Unite, with all the consequences that has for Labour’s future direction.

If you are marking a date in your diary for another eruption of public in-fighting, don’t forget the suggestion from John McDonnell and Diane Abbott that the polls will have turned by the end of the year – because you can be certain that Corbyn’s critics haven’t. But if you are betting on any party leader to lose his job anytime soon, put it on Nuttall, not Corbyn.

 

Stephen Bush is special correspondent at the New Statesman. His daily briefing, Morning Call, provides a quick and essential guide to British politics.