Original name: トヨタプリウス GT HIGH-PERFORMANCE HYBRID IS AN OFFICIAL CAR OF THE EVENT - UK debut for Toyota Prius GT sporting concept - 143bhp from the electrically-boosted 1.5-litre petrol engine - Accelerating to 62mph in 8.7 seconds - Fuel economy at normal speeds virtually unaffected by performance potential A new performance version of the Toyota Prius is to make its UK debut at the Goodwood Festival of Speed. The Prius GT has been developed to…