UK AltNet profile
Boldyn Networks
Boldyn Networks (formerly BAI Communications) is a major UK neutral-host infrastructure operator, with significant fibre and wireless network presence.
Headline numbers
| Founded | 2023 (rebrand from BAI Communications) |
|---|---|
| HQ | London |
| Region of focus | Nationwide UK (infrastructure and managed networks) |
| Premises passed | Infrastructure operator (not direct retail) |
| Premises ready for service | Infrastructure |
| Customers (latest) | B2B and infrastructure |
| Take-up rate | Infrastructure |
| Network tech | Neutral host infrastructure, fibre and wireless |
| Funding raised | Approximately 86 percent owned by CPP Investments (Canada Pension Plan Investment Board) |
| Last funding round | Continuous infrastructure investment (Ongoing) |
| INCA member | Yes |
| Last updated | May 2026 |
About Boldyn Networks
Boldyn Networks (rebranded from BAI Communications June 2023) holds the 20-year Transport for London concession signed June 2021 to deliver 4G and 5G coverage across all 121 underground Tube stations, the DLR, the Elizabeth line and the Windrush line, with completion targeted for end-2026 (62 of 121 underground stations were live at January 2026). Owned approximately 86 percent by CPP Investments.
Coverage notes
Nationwide UK infrastructure with London Underground and major-city public-realm focus.
Major build areas
London (LU mobile rollout), major UK cities (public-realm small cell).
Partnership opportunities
Neutral-host infrastructure partnerships. Public-realm and transport partnerships.
FBRE supports AltNets with geo-targeted tenancy, comparison site builds for resellers, and co-marketing collaborations. Network reach is verified at 12,000,000+ impressions and 730,000+ network clicks in the 12 months to 24 May 2026 (rolling average of 2,000+ clicks per day, rising fast). See AltNet marketing for placement and pricing.
How to reach Boldyn Networks-footprint switchers
- Geo-targeted tenancy on the FBRE network, single site from £99 per month.
- Postcode checker build that surfaces Boldyn Networks where available, from £4,500.
- Co-marketing on the FBRE AltNet Tracker.
- Comparison engine build for partner resellers, from £7,950.
Data and methodology
This profile uses INCA member published data where available, the operator's published trading updates and press releases, Ofcom Connected Nations data, and Companies House filings. Figures marked "data pending" reflect commercially confidential or not-yet-published numbers. See methodology for sourcing detail.