Supporting technical reports
Other reports which may be of interest can be found below:-
Uncertainty estimation for monitoring results by the WFD biological classification tools
http://publications.environment-agency.gov.uk/pdf/GEHO1006BLOR-e-e.pdf
Defining spatial rules for classification and combining multiple quality elements for WFD classification
http://publications.environment-agency.gov.uk/pdf/GEHO0807BMXZ-e-e.pdf
More information on the biological classification tools can be found below:-