Shell has pulled out of a joint venture with British Airways and Velocys to build a flagship sustainable jet fuels plant in the UK – in a blow to Boris Johnson’s claims that Britain could deliver the world’s first zero-emission long-haul flight, reports EURACTIV’s media partner, The Guardian Environment. The oil firm was named last year as one of the top companies set to “turbocharge government plans” for sustainable aviation fuels, the centrepiece of the so-called “jet zero” plan to decarbonise flights. Shell said it would leave the Altalto project, to be built in Immingham, Humberside, days after the company agreed to join a project in Canada which plans to produce more than double the volume of green fuel from less than half the waste.