Luke started competing with minimotos 2005 and after racing five years with minis he switched something a little bit bigger; 600cc. List of his results and trophies in minimotos speaks for itself. You can check it from here: http://lukeshelleyracin.yolasite.com/
Here is descreption for Luke's class Pre-National Sport 600: This class caters for Supersport, Formula and Superstock 600 machines, ridden by riders who have yet to obtain their National race licence. Such riders may still enter the main classes, but this category is designed to help them develop their skills and perhaps taste victory a liitle earlier than would be possible in the ultra competitive Premier classes.
Sources:
Luke Shelley Faceebok, lukeshelleyracin.yolasite.com, thundersportgb.com
Pics: Luke Shelley Facebook