Gillian Tatt

Litigation Partner

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Gillian is a partner in our commercial litigation team. She joined Square One Law in 2012 from the legal department of Northern Rock (Asset Management) where she had been responsible for advising on business issues and overseeing a substantial range of disputes.

Gillian has extensive experience in contractual disputes and risk reviews, IT and intellectual property disputes, claims by the Business Software Alliance (BSA), professional negligence, financial services mis-selling, insurance disputes, property related disputes, insolvency and Data Protection Regulations.

Gillian’s experience covers court action at all levels and across various specialist court divisions and lists. She is also experienced in advising on cross-border disputes and various forms of alternative dispute resolution including, arbitration, mediation, claims to the Legal Ombudsman, the Financial Services Ombudsman and the Pensions Ombudsman.

During her time at Square One Law, Gillian has successfully led and project-managed several complex multi-million pound group claims against banks and professionals acting on behalf of over 100 high net worth individuals concerning property investments, as well as leading a number of local businesses to successful outcomes in commercial disputes at trial.

Importantly, Gillian also has an acute awareness of client needs from outsourcing as part of her previous role as in-house counsel and manages the team to deliver timely, cost effective and commercially valuable advice on risk management to all clients in dispute situations.

Gillian invests time in understanding our clients’ businesses and circumstances to enable the advice she gives to be relevant and focussed.


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It is important to have a strong and trusted team of professional advisers. That is why I use Square One Law.

Peter Stephenson, Executive Chairman, Able UK,

The Square One Law team are excellent. They always provide us not only with rapid, detailed and most of all, cost effective guidance but also advice that is very commercial.

Trevor Silver, Chairman, Landid,

We’ve worked with Square One Law across our business from the start. They understand our proposition and can deliver in terms of us achieving quick turnaround times for our customer base, which will promote new benchmarks for the industry.

Stephen Pratt, Head of Originations, Atom Bank,
Able UK – Corporate
Landid – Property
Atom Bank – Corporate