"We decided to test out our Nissan Leaf and took it to the Hard Knott Pass. The car behaved as it always does, brilliantly. There was effortless power and torque throughout the journey and the best part was that it only used 2% battery covering the whole pass. Take a look at the video. The Leaf is 100% electric. The Hard Knott Pass has inclines of 33%. we made the journey both ways without drama or issue. The vehicle performed spectacularly as always. Thanks to the Woolpack Inn (Boot) for supplying free electric vehicle charging at 6.6Kw. The Leaf is one of my favourite cars. Its over delivered every time I've driven it. 10/10."
33% inclines? Apparently so, per Wikipedia:
Hardknott Pass is a hill pass that carries a minor road between Eskdale and the Duddon Valley in the Lake District National Park, Cumbria, England. It is the most direct route from the central Lake District to much of West Cumbria; however the road approaching the pass shares the title of steepest road in England with Rosedale Chimney Bank in North Yorkshire: both have a maximum gradient of about 1 in 3 (about 33%).