- Email: George.Mavrantonis@12os.com
George Mavrantonis was called to the Bar by Gray’s Inn in 2016; he completed pupillage and subsequently joined Chambers in 2019.
George specialises in public law through the sphere of immigration, asylum and nationality law.
Earlier in his career he spent two years at the UK Home Office. He spent one year as a Judicial Review Litigator where he assessed the defensibility of judicial reviews lodged against the Secretary of State. For the next year George appeared as a Presenting Officer concentrating on all human rights and asylum claims, EEA, entry clearance, and deportation.
To date he has appeared in more than 350 such trials, for both the Appellant and the Secretary of State. He has been involved in a number of high profile, public interest and intel cases. He maintains a heavy immigration caseload and comes highly recommended for matters of deception, sham marriages, out-of-country video-link appeals, PBS, criminal deportation and bails, equally for drafting and representation.
In asylum law alone, George has had conduct of claims from more than 40 nationalities worldwide which amongst others have included: witches, royalty, publishers, LGBT+, victims of trafficking, children, draft evaders, and politicians.
George has completed marshalling as a pupil at the European Court of Human Rights in 2018. He has been offered a secondment (legal traineeship) to commence in late 2019 in Strasbourg. He also accepts instructions as a member of the Attorney-General’s “Junior Junior” panel scheme as well as the Secretary of State. He can accept instructions by members of the public where appropriate, as well as solicitors.
Additional areas of specialism
- Nationality & Citizenship
Recent or notable cases
- Kabul Bhatia v Secretary of State for the Home Department  UT (HU/03190/2018)
George successfully appeared for the Claimant in this matter concerning the correct test that ought to be used in ETS/TOEIC deception cases as per SM and Qadir v Secretary of State for the Home Department  EWCA Civ 1167.
- VA and JA v Secretary of State for the Home Department  FTT (PA/10028/2018)
The Judge has commended George’s impact: “I was persuaded to adopt Mr Mavrantonis’s insightful views as my own” due to how “very cogently” submissions were made and to “endorse his relevant comments and critique”.
- Franco v Secretary of State for the Home Department  UT (EA/03642/2018)
Matter involving the distinction between comprehensive sickness insurance (CSI) under the EEA Regulations 2016 and the ruling in Ahmed v The Aire Centre  EWCA Civ 988 in relation to permanent residence for EEA nationals, following a previous unsuccessful appeal in the lower court. George successfully appeared for the Appellant.
- AR v Secretary of State for the Home Department  FTT (PA/12232/2018)
LGBT asylum appeal where George appeared for the State. The Judge referred to George’s strengths in cross-examination: “The couple were subjected to detailed parallel questioning in cross-examination. The questions by Mr Mavrantonis were thorough and designed to test the veracity and substance of the couple’s claimed relationship”.
- Asima Ali and a child v Entry Clearance Officer  FTT (HU/14890/2017)
An entry clearance case where the genuineness of the sponsor’s employment in the United Kingdom was impugned. George proved his case and successfully appeared for both Appellants.
- FA v Secretary of State for the Home Department  FTT (PA/08634/2018)
A test case where George appeared for the State. He persuaded the Court to depart from well-established country guidance caselaw on non-Arab Darfuris on both asylum and humanitarian protection grounds. He challenged three leading cases: AA (Non-Arab Darfuris) CG (2009) UKAIT 0056, MM Sudan  UKUT 00010, and IM and AI (Sudan) CG  UKUT 188. It is currently challenged in the higher courts.
- Ritendra Chinari v Secretary of State for the Home Department  FTT (HU/11125/2017)
Paragraph 322(5) HMRC tax deception case where George successfully appeared for the State.
- Samina Bibi and a child v Entry Clearance Officer  FTT (HU/02320/2018)
Case disputing the sponsor’s genuineness of employment and his financial circumstances. George successfully represented both Appellants.
- Public access qualified
- Accredited civil and commercial mediator
- The Honourable Society of Gray’s Inn
- Institute of Advanced Legal Studies
- 2014 – University of Surrey, LLB Bachelor of Laws (Hons), 2:1
- 2015 – University College London, LLM Master of Laws, Upper Merit
- 2016 – BPP University London, BPTC, Very Competent
In his spare time, George is an amateur photographer and a devoted philatelist. He was also a former sergeant in the Army for two years.