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Following the perceived success of this month鈥檚 Paris Climate Conference (COP21), the strong reference to holding temperature increases to just 1.5C means, for the first time since the COP series began, that the UK government will have to seriously face the reality of the intervention levels required, to deal with the threat that climate change means.

For the past 25 years all UK governments have been able to strut their stuff, confident that our record in cutting back on greenhouse gases since the traditional base year of 1990 has been far better than most. But what if the base year had been just five years later? Because it was during the first part of the 1990s that the great bulk of British coalmines shut. And as a result of that first Dash for Gas, the carbon content of our electricity was completely transformed.

For the past 25 years all UK governments have been able to strut their stuff, confident that our record in cutting back on greenhouse gases since the traditional base year of 1990 has been far better than most

To be frank, unless you are an ex-employee of the National Coal Board, the chances are you and your family haven鈥檛 had to adjust your lifestyles at all, even while our nation鈥檚 emissions have tumbled. Those easy early successes lulled the entire British political establishment into a bland confidence that confronting the threat of climate change was practically pain-free. In turn, enabling the House of Commons to vote so overwhelmingly for the Climate Change Act in 2008.

But even allowing for Amber Rudd鈥檚 grand gesture of announcing the future demise of the rest of coal-fired electricity, in fact the amount of carbon emitted from coal-based electricity has continued falling during this century, largely due to declines in the amount of power consumed as machinery becomes more efficient.

From now on Britain won鈥檛 have such an easy way to meet its carbon commitments, especially during the next decade. If the agreed carbon budgets are to be met, it will require far more interventionist measures regulating our behaviour, intervening in our lifestyles than has yet been countenanced.

Continuing to duck away from requirements like 鈥渃onsequential improvements鈥� (when you expand your building鈥檚 size, you must improve the energy performance of the original construction too); or penalising in tax terms those who keep selling or letting out energy inefficient buildings, will simply no longer suffice.

At least, not if UK politicians want to be able to continue to be able to pose as world leaders.

Andrew Warren is the hon president of the Association of the Conservation of Energy. He was its founding director.