The Guardian - Startup that hoped to transform UK car production was once valued at more than £800m, but collapsed worth a tiny fraction of thatWhen Britishvolt, a startup hoping to transform UK car production by making batteries for electric vehicles, rented a seven-bedroom £2.8m mansion with a swimming pool and Jacuzzi-style bath for workers, some employees were uncomfortable with the impression it gave of lavish spending.Founded in 2019, Britishvolt began with grand ambitions hailed by the then prime minister, Boris Johnson to become the first domestically owned battery factory in a car industry that ...