  The viability of the Non-Perturbative Renormalisation (NPR) method of the
Rome/Southampton group is studied, for the first time, in the context of domain
wall fermions. The procedure is used to extract the renormalisation
coefficients of the various quark bilinears, as well as the four-fermion
operators relevant to the $\Delta S=2$ effective Hamiltonian. The
renormalisation of the $\Delta S=1$ Hamiltonian is also discussed.
