Dunlop motorcycle trials (Isle of Man?).
Unknown location but could be the Isle of Man.
Full titles read: "Dunlop Cup - Competitors at the start of the 145 Mile Reliability Trial."
M/S's of the competitors milling around before the start of the trials many are wearing motorcycle hats and goggles. M/S of motorcyclist on bike ready to begin the trial, an official stands next to him with a notepad. The motorcyclist rides away. Another competitor gets ready to start.