Just heard from my pal Rich Altman at the Commercial Aviation Alternative Fuels Initiative (CAAFI) that certifying body ASTM International is about to approve hydrotreated renewable jet fuel for use in aviation.
After several false starts (approval was expected to happen in December) it now looks as though the green light could be given just in time to allow flights operating on a biofuel blend to take part in this year's Paris air show.
Biofuels are going to play a big part in #PAS11 and plans have been put in place to operate flights partially-powered by alternative fuels during the show - the organisers have just been waiting with their fingers crossed for this approval to come through in time.
This is exciting stuff. Watch this space for continued coverage during the air show.