BT Group Reports Strong Fiber and 5G Growth in Q1 2025 Trading Update

The Nation’s Digital Backbone Flexes Its Muscles

BT’s latest trading update reveals a fascinating dichotomy: massive infrastructure progress powering ahead while traditional revenue streams face headwinds. CEO Allison Kirkby’s “solid start” assessment feels like classic British understatement when you see the sheer scale of their network build.

Fibre: Laying the Tracks at Breakneck Speed

Openreach is operating like a well-oiled machine:

• Relentless Build: Over 1 million premises passed with FTTP for the sixth consecutive quarter, averaging a staggering 81,000 builds per week. That’s like connecting a decent-sized town every seven days.
• Rural Reach: Footprint now exceeds 19 million premises, with 5.2 million in rural locations – a critical step in closing the digital divide.
• Demand Exploding: Customer appetite is voracious. Net FTTP adds surged 46% year-on-year to 566,000. Total connections hit 7.1 million, pushing take-up to a market-leading 37%.
• Wholesale Win: Hyperoptic signing a wholesale agreement is a quiet but significant nod to Openreach’s national infrastructure value.

Consumer & Mobile: Steady Growth Amidst Pricing Pressure

• Customer Gains: Broadband base grew by 11k, postpaid mobile by 41k – positive net adds in a competitive market.
• 5G Momentum: 5G base reached 13.5 million, up 12% YoY. Coverage now at 87% of the UK population is no small feat.
• ARPU Nuance: Consumer broadband ARPU dipped 2% to £41.9, mobile held steady at £19.4. This reflects the competitive pricing environment, even as customers flock to faster fibre and 5G.
• Convergence Creeping Up: More customers bundling fixed and mobile (25.5%, up from 24.6%). EE’s Lionesses sponsorship is smart branding playing into this ecosystem.

Business & Costs: Transformation in Action

• Business Reshuffle: UK service revenue down 2%, pressured internationally. The planned split into separate UK and International units from Q2 FY26 signals a strategic focus on these distinct challenges.
• Cost Crunching: Efficiency gains were the star here, fully offsetting higher wage/National Insurance costs:
  • Network energy usage down 5%
  • Total labour resource down 5% to 113k
  • Openreach repairs down 14%
• Customer Love: Group NPS jumped 5.6 points to 30.4 – proof that simplification efforts are improving real-world experience.

Financials: Investing Through the Squeeze

The headline numbers reflect the transition phase:

• Revenue: Adjusted revenue £4.9bn (down 3% YoY). Weakness in Consumer handsets and Business International offset Openreach fibre growth.
• EBITDA Resilience: Adjusted EBITDA £2.1bn (down only 1%). Cost transformation did heavy lifting, mitigating revenue pressure.
• Profit: Reported PBT £468m (down 10%), impacted by higher finance costs and depreciation – the inevitable consequence of that massive infrastructure investment.

The Verdict: On Track, But Eyes on the Horizon

BT is executing its infrastructure playbook with impressive discipline. The fibre and 5G build is monumental, and customer adoption is accelerating. While near-term financials show the strain of investment and market shifts (especially in Business International), the cost transformation engine is firing.

The crucial takeaway? Management is reconfirming all FY26 and multi-year financial targets. This signals confidence that the current growth and efficiency drivers will ultimately translate into stronger financial performance as the build phase matures and customer migration to higher-value products continues.

BT is quite literally rewiring the UK. The short-term revenue dip is the price of that future-proofing. For investors, it remains a story of patience and belief in the long-term network advantage they’re relentlessly constructing.