Original sentence: A review of the trial results by Bulleid's assistant, John Click (a secondee from BR) showed that the locomotive generally performed well, with excellent riding (apart from the above exception) at speeds up to 70 mph (113 km/h); much of the running was at high speeds
Edited sentence: A review of the trial results by Bulleid's assistant, John Click (a secondee from BR) showed that the locomotive generally performed well, with excellent riding (apart from the above exception) at speeds up to 70 mph (113 km/h); much of the test running was at high speeds