Ukraine’s ability to defend itself against the Russian invasion has surprised almost everyone outside the country, none more so, presumably, than Vladimir Putin. As for the West’s efforts to harm Russia through sanctions on its fossil fuel exports, that is a very different matter. Sanctions have not been entirely useless. According to a report by the think tank Centre for Research on Energy and Clean Air (CREA), they have led to Russia losing over €200 million (£173 million) a day relative to what it was earning at the start of the year: €880 million (£692 million) per day in May compared to €1.1 billion (£951 million) per day in January and February. But, thanks to much higher oil and gas prices caused in part by the invasion of Ukraine itself, Russia is still earning more revenue than it did last year.