  We present results from simulations using 2 flavours of O(a)-improved Wilson
quarks whose masses are about 1/3 of the physical strange quark mass. We
present new data on the mass of the singlet pseudoscalar meson and evidence of
the onset of chiral logarithms in the pion decay constant. The previously
observed suppression of the topological susceptibility at lighter quark masses
is confirmed. We report on the performance of the hybrid Monte Carlo algorithm
at light quark masses.
