If you go hiking in a pristine Norwegian forest in the not too distant future, you might be surprised to discover that it was put there by none other than Simmons & Simmons, which has today proudly proclaimed itself to be the world’s first carbon-neutral law firm.

In fact, Simmons is yet to decide precisely how it is going to mitigate the environmental damage caused by its carbon emissions. But it has calculated how much money it must spend in order to neutralise the damage it is causing the planet. It amounts to £114,000 a year.