- Net Promoter Score (NPS)
- Customer churn
- Ombudsman complaints
- Energy sold
- Services to customers
- Dual fuel (electricity and gas) customers
- Electricity customers paid a feed-in tariff
- Carbon Neutral services to customers
- Online sales volumes
- Digital adoption
- Average level of debt of customers on Staying Connected
- Customer debt
- Customers on standing offers
- Services per customer
- Green revenue as a % of total revenue (%)
- Speed to market