  We consider the behaviour of quantum Hall edges away from the Luttinger
liquid fixed point that occurs in the low energy, large system limit. Using the
close links between quantum Hall wavefunctions and conformal field theories we
construct effective Hamiltonians from general principles and then constrain
their forms by considering the effect of bulk symmetries on the properties of
the edge. In examining the effect of bulk interactions on this edge we find
remarkable simplifications to these effective theories which allow for a very
accurate description of the low-energy physics of quantum Hall edges relatively
far away from the Luttinger liquid fixed point, and which apply to small
systems and higher energies.
