Sports science was his stepping stone as he did not have the grads to do physio directly from school. He then used this to earn some money as he managed a large health and fitness studio. This gained him access to physio where he maintains a keen interest in iron man events and adventure racing. This is both for himself and his clients.
Having a sports science degree assists you with some of the applied physiology when studying in the UK. In Australia however the applied physiology componet of the physio course is excellent and much above that of a sports science degree. Unfortunately this is not so in the UK. In OZ the sports science degrees do however have excellent training in human movement and kinesiology.
As far as I am aware (and this is biased) Football clubs have exercise trainers as the are cheaper to do run of the mill training. A lot of physios would not work for the money as a fulltime job and would manage the input from the trainers. This is like the practices I have worked in in Canada where we emplyed several AT's (Athletic Trainers). They were an essential and valued part of our team but did work under our supervision.
The term Sports Therapist is perhaps a bit over titled. (Can't wait for the comments on that one).