Alex Guest

Alex is a Senior Associate at Signature Litigation’s Gibraltar office, specialising in commercial litigation.

With more than 10 years of experience, he represents a broad range of clients, including banks, trustees, high-net-worth individuals, private companies, and property developers. Alex handles complex disputes in the High Court of England & Wales and the Supreme Court of Gibraltar, providing expert legal advice in high-value commercial matters.

Alex’s practice spans several key areas, including fraud, professional negligence, contractual, and commercial disputes. He has experience in Proceeds of Crime Act (POCA) proceedings, complex cross-border sanctions issues, and admiralty law, particularly maritime claims and ship arrests. His deep knowledge of these specialised areas enables him to offer tailored, strategic solutions for clients facing intricate legal challenges.

Beyond his work in Gibraltar and England, Alex brings valuable international experience, having assisted clients in litigation proceedings before courts in Spain, Malta, Taiwan, and the United States.

Alex is equally adept at navigating regulatory compliance issues, advising clients on disputes within complex regulatory frameworks. His proactive approach and composure under pressure ensure that clients receive the highest standard of support when it matters most.

Before joining Signature Litigation, Alex practised at firms in Spain and Malta, focusing on corporate, commercial, and litigation matters. He subsequently served as a partner at a Central London firm, where he led the international desk and managed high-profile cross-border disputes and transactions. This wealth of international experience affords him a well-rounded perspective on global legal issues, enabling him to provide comprehensive advice to clients with diverse needs.

Alex was called to the Bar in Spain in 2012 and qualified as an English Solicitor in 2017. He was admitted as a solicitor to the Supreme Court of Gibraltar by the Chief Justice in October 2024. Alex is a native Spanish speaker and is fluent in English.

Memberships

Law Society of England and Wales
Ilustre Colegio de Abogados de Cádiz
Gibraltar Bar
Appointed member of the Asociación Española de Derecho Marítimo
YIAG Member of the LCIA

Representing the trustees of two Jersey related trusts with assets valued in excess of GBP 200m in a dispute with members of the family involving allegations of a breach of trust and an attempt to remove the trustees. The matter involved strategic coordination of legal teams in multiple jurisdictions and mediation.
Advising an individual in relation to a potential claim for up to GBP 30m arising out of a consultancy agreement with a Gibraltar registered company and concerning the implications of a subsequent asset purchase agreement entered into by the Gibraltar company with another entity.
Advising a Gibraltar financial services company with international reach on the potential implications under Gibraltar sanctions law of certain proposed transactions involving Russian nationals.
Representing a global operator in the online gaming and sports betting industry in a GBP 30m dispute with its shareholders before the Supreme Court of Gibraltar. The matter concerns the divestiture of shares and US regulatory compliance.
Representing a former director and shareholder of a Gibraltar insurance company, in a cross-border dispute valued at over GBP 20m brought by the company’s joint administrators, involving allegations of corporate mismanagement, regulatory breaches and financial misconduct.
Representing several defendants in a GBP 10m dispute concerning the ownership and control of digital assets and involving allegations of breach of trust and fiduciary duties. The matter included applications to the Supreme Court of Gibraltar to discharge the WFO and trust preservation orders obtained by the claimants.
Representing an African bank, a secured creditor under a first priority mortgage over a cargo vessel, in a multi-million GBP claim against other creditors for recovery of the debt under the mortgage following the arrest and sale of the ship. The matter involved the determination of priorities between creditors of the vessel.
Representing and defending former shareholders of a UK company in high‑value proceedings involving allegations of misrepresentation and fraud arising from a share sale agreement. The matter also included complex issues relating to limitation periods, particularly in the context of an application to amend the claim after the expiry of the statutory deadline.
Representing a UK company in a high‑value dispute exceeding GBP 10m against a Taiwanese bank, involving allegations of misrepresentation and vicarious liability arising from a bank manager’s issuance of a fraudulent letter purporting to secure a GBP 20m investment. The matter included complex jurisdictional issues, with parallel proceedings in both England and Taiwan.

Article: The UK-EU Agreement on Gibraltar: A new chapter for cross-border relations – Spanish Chamber of Commerce in the UK – 15 July 2026

Article: Why jurisdiction matters – Maritime Risk International – 20 September 2025

Article: Gibraltar’s admiralty jurisdiction and sanctions law – Maritime Risk International – 21 May 2025

Article: Mandatory ADR in Spain: an opportunity for amicable dispute resolution? – Solicitors Journal – 24 January 2025

Article: Hague 2019 Convention: Positive news for UK and EU businesses – 29 January 2024

Article: High Court provides guidance on high Part 36 offers from Claimants – 11 July 2023

Article: Enforcement of judgments (United Kingdom to Gibraltar) – 20 April 2023