  I present results of recent work for the UKQCD Collaboration on the light
hadron spectrum using a non-perturbatively O(a)-improved Wilson action with two
degenerate flavours of dynamical quarks on a 16^3x32 lattice. Values of the
bare gauge coupling and bare dynamical quark mass were chosen to keep the
lattice spacing fixed at two distinct values in physical units as determined
through the Sommer scale parameter, r0. I also include results for a quenched
ensemble with a lattice spacing matching one of these dynamical sets and
results from an exploratory run at lighter bare quark mass.
