Thanks for your comments. With regard to the settings for this shot -
F 10 aperture priority - Firstly I wanted a good depth of field, secondly this Canon kit lense lacks detail and sharpness. A narrow aperture helps improve this. Therefore I need to operate in Aperture Priority with this lense to maintain a reasonable image reproduction.
ISO 400 - This was the variable "adjuster" to ensure a fast enough exposure. Fast exposure was required because it is an action shot. Lower ISO would have significantly reduced the shutter speed to a point maybe too low to freeze the action.
Exposure 1/1600 - I wanted at least 1/1000 because of the speed of the action, and had the AF set on "servo" to ensure a constant and fast focus bracket.
I´m glad you think it´s a nice photo.