ERA restarted operations in Dunstable under new ownership in 1947 when Leslie Johnson bought the company, together with ERA E-Type GP2, the second of two built in 1939, which had been raced by Reg Parnell and Leslie Brooke. Refitted with a Zoller supercharger and driven by Johnson, GP2 tied with Parnell's Maserati 4CLT for fastest lap in the 1948 British Empire Trophy and finished fifth. In the same race GP1, upgraded by the works with Murray Jamieson-designed Roots-type supercharging and driven by Reg Parnell's mechanic Wilkie Wilkinson (who had supervised modification of the E-Types), retired with a broken connecting rod.