Thank you, Ann and knb, I am glad you like them.
MFloyd, the photos were shot on the Fuji X-T2 in AF-C mode, using back button focus, CH and single AF point. Most were shot in AF-C Custom Mode 1 (normal), but where I was below the fence I used Custom Mode 4 (suddenly appearing objects). Most were shot with the 50-140, but the photo of the rider coming through the water and facing the camera was taken on the 100-400. Shutter priority was used, at between 1/1000 and 1/2000, with the ISO between 20 and 1,250 depending on the aperture I wished to use. I increased the exposure for shots with a bright background, to minimise the dark face effect.