Enlarge / Polestar is developing a four-door electric GT called the Polestar 5, which goes on sale in 2024. (credit: Polestar) Polestar provided a flight from Washington, DC, to London and back and two nights in a hotel so we could visit its UK R&D center. Ars does not accept paid editorial content. NUNEATON, ENGLAND—Any day is a good day that involves a visit to a proving ground, even if that includes a two-hour drive fresh from a transatlantic flight.