Track frame around £250

If I was 5 ft 10, Id be looking at 55cm frames, but I guess you have time to grow into it so a 56/57 might not be that bad. get properly measured up or use this http://www.competitivecyclist.com/za/CCY?PAGE=FIT_CALCULATOR_INTRO

i just did the fit calculator, and it gives me different types of fits like the competitive fit, the eddy fit and the french fit...
what do they mean?