B.1 Introduction 117 B.2 Option Categories and Intervention Types 118 B.2.1 Data sources and categorisation 118 B.3 Scoring Metrics and Option Screening 120 B.3.1 Scoring criteria and metrics 120 B.3.2 Scoring mechanism 121 B.4 Options Modelled 123 B.4.1 Natural Capital Option 124 B.4.2 Deephams Reuse Option 125 B.4.3 London WRZ Options 126 B.4.4 Metering Option 126 B.4.5 Leakage Reduction Option 127 B.4.6 Reducing Misconnections Option 127 B.4.7 SuDS Option 127 B.5 Options viewed as enablers 128 B.5.1 Benefits of enablers 128 B.5.2 Options included as enablers 128 B.5.2.1 Skills through training 129 B.5.2.2 Engaging communities 129 B.5.2.3 Community partnership officer 129 B.5.2.4 Lea catchment website 129 B.5.2.5 Coordination of development 130 B.5.2.6 Sustainable policy 130