  The transition from the quantum Hall state to the insulator is considered for
non-interacting electrons in a two-dimensional disordered lattice model with
perpendicular magnetic field. Using correlated random disorder potentials the
floating up of the critical states can be observed in a similar way as in the
continuum model. Thus, the peculiar behaviour of the lattice models reported
previously originates in the special choice of uncorrelated random disorder
potentials.
