R. Wadsworth - University of York
P. Regan - University of York
S. M. Mullins - University of York
G. J. Gyapong - University of York
D. L. Watson - University of York
P. J. Nolan - University of Liverpool
M. J. Godfrey - University of Liverpool
I. Jenkins - University of Liverpool
Y. J. He - University of Liverpool
B. J. Varley - University of Manchester
J. Simpso - Daresbury Laboratory
W. Gelletly - Daresbury Laboratory