The idea here is to test out whether or not it makes sense for for-hire companies to use EVs. The 50 vehicles are part of a study run by the Energy Savings Trust (EST) and Uber. EST's mission is to find out how Uber drivers use the EVs and if there are enough charging stations in the city to make their work feasible.
This is the first time that all-electric vehicles are available from Uber in the UK (but it did use some in Chicago last year). In a statement, Nissan Europe's head of electric vehicles, Gareth Dunsmore, said that this test, "could prove to be a pivotal moment for tackling the challenges in London." It's only taken 13 years to get this far.