News that Formula E has opened its chequebook and invested in Extreme E might come as a surprise to many. The two FIA-sanctioned all-electric championships both work out of the same building in London. Both were co-founded by Alejandro Agag and both cars - the standardised FE chassis and the ODYSSEY 21 E-SUV used by XE - are built by Spark Racing Technology and share an array of electric motor componentry.
Surely, on a surface level, they were sister series. So why has FE moved this week to become a minority shareholder, with its chief executive Jamie Reigle now on the XE board of directors?
"We're calling it the 'electric alliance'," Agag says to Autosport with a wry smile as he sits next to Reigle, the pair making final visits to the Hammersmith office ahead of the second UK national lockdown.