  Measurements of cosmic-ray muon rates and energy deposition spectra in a one
tonne liquid scintillator detector at 1070 metres vertical depth in the Boulby
underground laboratory are discussed. In addition, the simulations used to
model the detector are described. The results of the simulations are compared
to the experimental data and conclusions given. The muon flux in the laboratory
is found to be (4.09+/-0.15)x10^-8 /cm^2/s.
