Katherine is a highly experienced competition lawyer, with a strong focus on digitalisation and competition in tech markets. She also leads Osborne Clarke's Publishing group, building on her extensive work in this sector.

Katherine's transformation and sector focus flows through into her work, with recent experience including advising on the UK Competition and Markets Authority market study into digital advertising; the European Commission's Internet of Things sector inquiry and the Payment Systems Regulator's first competition investigation in the payments sector. She has also advised on leading tech mergers in the UK, EU and beyond.

Katherine has a strong focus on 'future proofing' clients' business models in an environment of rapidly evolving competition law and she frequently helps clients from a range of industries engage in consultations, Government engagement and lobbying work, underpinned by her deep technical knowledge and strategic approach.

The CMA is “setting out its stall as a world leader in competition post-Brexit”, says Katherine Kirrage, a digital competition and regulatory lawyer at Osborne Clarke, a law firm. - The Economist

Katherine Kirrage is a cut above the rest. She has in-depth detailed knowledge of competition law issues and how those impact digital streaming services. Not only is she technically excellent but she provides helpful practical guidance as to how to navigate the complexities of the competition law landscape."
- The Legal 500

Hear more from Katherine about digital inclusion in this podcast:

Helping you succeed in tomorrow's world

I am an OC Transformation Manager for Digitalisation and work with a range of clients on the digitalisation of their businesses.

I am also passionate about diversity and inclusion and am a Diversity Champion for social diversity, helping launch our new Social Diversity committee and working on a range of initiatives to promote and support social diversity within OC, our clients and the legal profession more broadly.


Advised this leading advertising intelligence business on the CMA's Phase II review of its acquisition by Nielsen.

The UK Publishers Association

Trusted advisor on a range of strategic competition law matters.

Leading UK payments provider

Acting on the first Competition Act investigation by the UK Payments Systems Regulator.

Social media company

Advised on global competition investigations.

Leading computer games publisher

Representing a leading computer games publisher on a European Commission investigation.


Advised on Phase II UK clearance of the Optimax/Ultralase transaction.

Dixons Carphone

Advised on European Commission clearance of the Dixons Carphone merger.