Real audits. Real numbers.

Course drains entirely to on-site ponds. Surface water drainage non-applicable since 2018. Clubhouse kitchen tier reclassified. Two estimated-read corrections.

• Surface water drainage£28,400
• Estimated meter reads£9,780
• Trade effluent tier£4,000

Seven-school trust. Two detached sports blocks closed in 2021 still billed for standing charges. Surface water drainage applied to three sites with sports-field soakaways. VAT incorrectly applied to qualifying education use.

• Surface water drainage£19,200
• Standing charges (closed blocks)£8,640
• VAT overcharge£3,800

Three-site portfolio. Two sites on commercial trade effluent tier when domestic-equivalent applied. Surface water drainage non-applicable on one site, which drains to garden lawns.

• Trade effluent tier£9,800
• Surface water drainage£6,320
• Estimated meter reads£2,300

Plant-yard irrigation drains to soil, not the sewer. Surface water drainage non-applicable across the full site. Glasshouse meter estimated for four years.

• Surface water drainage£10,980
• Estimated meter reads£3,780

Effluent testing showed COD/BOD levels consistent with Tier 2, not Tier 3 as billed. Three retired process meters still on standing charges. Surface water drainage applied to hardstanding that drains to a retention pond.

• Trade effluent tier reclassification£31,200
• Standing charges (retired meters)£12,840
• Surface water drainage£8,300

Mixed arable and livestock estate. Surface water drainage applied to agricultural land draining to ditches and watercourses. Livestock meter estimated for three consecutive years; correction revealed consistent overstatement.

• Surface water drainage£14,600
• Estimated meter reads£7,580