Openreach is key to BT's stability and future and is being rolled out at pace – in the most recent three-month period (fiscal second quarter) an additional 860,000 premises were reached by the unit's fibre network, while the take-up rate for Openreach's fibre lines stands at a healthy 33%. BT's retail business, which is the anchor customer for Openreach, saw its fibre-to-the-premises (FTTP) connections grow by 48% year on year to 2.2 million, while the telco's 5G customer base grew by 42% year on year to 9.9 million. For further details, see this earnings announcement.