89 Bickersteth Road

London SW17 9SH

0203 490 1221

Client Support

On Billy Yin Li

On Billy Yin Li

Phone Number:

0203 490 1221



Assistant Solicitor

Billy is a Solicitor of the Supreme Court of England and Wales. He is a dual-qualified lawyer with substantial experience in litigation. Before being admitted as a Solicitor in England and Wales, in 2023, he practised as a Barrister in Hong Kong from 2016. 

Billy completed Post-graduate Degree in Law (LLM) at Queen Mary University of London, with distinction, in 2022.

Extensive litigation experience: 

Billy defended hundreds of clients from arrests to appeals, both as a sole advocate and as junior counsel in criminal proceedings. He handled cases including high value theft.  He also advised on regulatory matters. 

Billy was regularly instructed by the HKSAR Government to prosecute cases in all the Magistrate Courts.

Areas of work

Billy represents clients in Company law matters, Family and Family Finance matters, Landlord & Tenant, Employment & Discrimination cases as well as Immigration & Human Rights matters. He deals with different stages of civil proceedings including drafting of Pleadings, such Particular of Claim, Defence, reply, Skeleton Argument and handles interlocutory applications as well as trials.

Billy has found CITYWIDE Solicitors a very suitable environment and has adapted well with the team of lawyers and with the firm’s civil matter work.

As a result of his criminal law background and experience in criminal law, Billy is an expert in Immigration Bail applications, and jointly with the other colleagues in the firm’s Immigration Team, has achieved huge success rate.

Billy is dependable and disciplined and driven. He wants the best for every client.

Outside of Work

Billy has a keen interest in grassroot football. As a London FA licensed Referee, he regularly officiates local league matches at weekend. He also has keen interest in running. He also loves to take part in 10k mini-marathon and has done so for many years; he has set himself a goal of completing a full marathon in the near future.


Billy is multilingual. He is  fluent in Cantonese and Mandarin.

Managing Director

Theo Mathias-Nwaulune

Founder & Principal Solicitor/Managing Director

Wendy Akaigwe

Associate Consultant Solicitor

Adil Zayn

Adil Zayn Trainee Solicitors)

On BillyYin Li

Assistant Solicitor

Renée Mathias-Nwaulune

Head of Administration

Abigail Ajayi

Assistant Head of Administration

Our Practice Areas

Our Clients Satisfaction Ratings

Civil Litigation
Immigration & Nationality
Wills & Probate

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