Interconnection regulation

Interconnection regulation ensures that providers of electronic communications networks give each other access on fair and reasonable terms. This page explains the regulatory obligations applying to network access in the UK, including the General Conditions of Entitlement and SMP access conditions imposed on dominant providers. It focuses on regulatory interconnection under the Communications Act 2003, rather than commercial peering or bilateral arrangements, which we discuss in our interconnection agreements page.

Legal basis for interconnection regulation

Ofcom regulates access and interconnection under the Communications Act 2003 and the General Conditions of Entitlement. Where Ofcom identifies markets with significant market power, it may impose specific access and interconnection obligations on designated providers.

Key interconnection regulation legislative instruments include:

• Communications Act 2003, in particular sections 73 to 74 and 87 to 91
• General Condition A1 (network access and interconnection)
• SMP conditions imposed following market reviews
• Ofcom’s access dispute resolution powers under sections 185 to 191
• competition law duties under the Competition Act 1998
• Ofcom guidance and regulatory statements on access and interconnection

These instruments together establish a coherent framework governing interconnection regulation, network access, transparency, non-discrimination and access disputes.

Interconnection regulation under the General Conditions

GC A1: network access and interconnection

GC A1 imposes baseline obligations interconnection regulation on all providers of public electronic communications networks. Providers must:

• negotiate interconnection on request
• comply with reasonable requests for network access
• offer access on fair and reasonable terms
• avoid undue discrimination
• publish information where required by Ofcom
• ensure interconnection is secure, interoperable and technically compatible

These interconnection regulations obligations apply regardless of market power, although they are supplemented by more extensive obligations where SMP is found.

Reasonableness and technical feasibility

When assessing whether a request for network access is reasonable, Ofcom considers factors such as:

• technical feasibility
• investment incentives
• long-term consumer benefit
• network integrity and security
• potential disruption to existing services

Providers may refuse requests only where reasonable grounds exist. Commercial inconvenience or internal priorities are not generally sufficient grounds for refusal.

Non-discrimination and transparency in interconnection regulation

Providers must:

• offer equivalent access to providers in similar circumstances
• provide information on terms, conditions and technical specifications
• avoid offering internal downstream divisions more favourable terms than external customers

These principles ensure fair competition and efficient market entry.

SMP access obligations

Where a provider is designated as having SMP following a market review, Ofcom may impose tailored access and interconnection obligations. These may include:

• requirements to provide specific forms of network access
• transparency obligations, including reference offers
• non-discrimination obligations
• accounting separation
• obligations relating to price control or cost orientation
• quality-of-service requirements

SMP obligations may vary across markets, such as local access, leased lines or mobile call termination.

Reference offers

SMP providers may be required to publish reference offers setting out:

• standard terms for interconnection
• pricing and cost methodologies
• service descriptions
• ordering and forecasting arrangements
• fault management and escalation processes
• service level commitments

Reference offers provide predictability and facilitate negotiation between providers.

Price control and cost orientation

Where Ofcom identifies risks of excessive pricing, it may impose:

• cost orientation
• charge controls
• margin squeeze safeguards
• pricing transparency requirements

These controls are designed to ensure efficient entry and protect competition.

Interconnection disputes

When disputes arise

Disputes may arise where:

• a request for access is refused
• parties cannot agree on technical or commercial terms
• SMP obligations are not complied with
• pricing appears excessive or discriminatory
• interconnection quality or interoperability is inadequate

Where negotiations fail, parties may refer a dispute to Ofcom.

Ofcom’s duties to resolve disputes

Under sections 185 to 191 of the Communications Act, Ofcom must resolve qualifying disputes within four months in most cases. Ofcom will:

• decide whether the dispute falls within its jurisdiction
• gather information from both parties
• apply relevant statutory duties and regulatory conditions
• issue a binding determination
• publish its reasoning, subject to confidentiality

Dispute resolution is intended to provide a timely and authoritative outcome, reducing the risk of prolonged commercial deadlock.

Interconnection regulation and competition law

In addition to sector-specific regulation, network access and interconnection are subject to competition law requirements. Ofcom holds concurrent powers with the Competition and Markets Authority under the Competition Act 1998.

Relevant competition issues may include:

• refusal to supply or grant access
• discriminatory access terms
• margin squeeze conduct
• unfair or exploitative pricing
• practices hindering market entry

Competition law may be applied alongside, or as an alternative to, sector-specific access regulation where appropriate.

Commercial interconnection

Where no SMP or GC A1 issues arise, interconnection is a commercial matter. Providers negotiate terms, often based on technical interoperability, traffic forecasts, routing arrangements and commercial strategy. This page focuses on regulatory access and interconnection; commercial arrangements are covered in the Transactions and Commercial Agreements clusters.

Technical and operational considerations

Providers must ensure that interconnection is supported by:

• compatible signalling, switching and routing
• adequate capacity and quality of service
• resilient and secure interfaces
• accurate and up-to-date interconnect documentation
• agreed testing and migration processes

Ofcom may consider technical compatibility and network integrity when assessing the reasonableness of access requests.

Future direction of interconnection regulation

Industry and regulatory developments continue to evolve, including:

• transition to all-IP networks and retirement of the PSTN
• revised interconnection architectures using SIP and IP-based interfaces
• strengthened security requirements under the Electronic Communications (Security Measures) Regulations
• growing emphasis on interoperability in cloud and virtualised network environments
• potential updates to SMP conditions following market reviews

These developments may change how interconnection is delivered but do not alter the fundamental regulatory duties to provide access on fair, reasonable and non-discriminatory terms.

How Bratby Law assists

We advise communications providers on the full range of access and interconnection issues, including:

• understanding obligations under GC A1 and SMP conditions
• managing network access requests
• negotiating regulated interconnection agreements
• preparing or reviewing reference offers
• responding to Ofcom investigations or information requests
• bringing or defending access disputes
• compliance audits and training
• competition law considerations in access arrangements

Why clients choose Bratby Law

• deep expertise in UK telecoms regulation and interconnection frameworks
• experience acting for fixed, mobile, VoIP and wholesale providers
• insight into Ofcom’s regulatory approach and dispute resolution procedures
• ability to manage complex multi-party interconnection issues
• clear and practical guidance tailored to technical and commercial realities

Independent directory rankings

Our specialist expertise is recognised in major independent legal directories:

• Chambers & Partners: Rob Bratby is ranked in the UK Guide 2026 in the “Telecommunications” category: Chambers
• The Legal 500: Rob Bratby is listed as a “Leading Partner – Telecoms” in London (TMT – IT & Telecoms): The Legal 500
• Lexology: Rob Bratby is featured on Lexology’s expert profiles (Global Elite Thought Leader): Lexology

What clients say

See also

• Why Bratby Law? UK Telecoms Lawyers and AI Lawyers for Regulated Markets
• Services
• Transactions
• Co-counsel
• Fractional General Counsel

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