Twenty Essex - True Picture

Twenty-Twenty (Essex) vision: Run “a bit differently and more modernly than other chambers,” cross-border specialists Twenty Essex foster “a strong sense of community.”

Twenty Essex pupillage review 2026

The Chambers



Those familiar with the solicitor’s side of the Chambers Student Guide will know that there are plenty of law firms with offices all over the world, and that often means cross-border work becomes their bread and butter. The Bar side of the profession, however, has always been very different and offices overseas aren’t such a regular occurrence. Twenty Essex breaks the mould, sporting an office in Singapore and specialising in the kind of work that “often involves cross-border elements,” according to practice director Anthony Carroll.

“If oil is found on some uninhabited island, there is debate over who owns this particular piece of land.”

The sort of work that make up the bulk of the practice at Twenty Essex is always evolving, but for Carroll, the set’s focus areas tend to be built around the likes of civil fraud (both litigation and arbitration), commercial disputes, shipping and commodities, and public international law, both of the latter receiving a top-tier nod from the Chambers UK Bar guide in London.

This means that barristers at Twenty Essex could well be dealing with disputes over the very borders their work stretches across: “If oil is found on some uninhabited island, there is debate over who owns this particular piece of land,” co-chair of the pupillage committee, Julian Kenny KC adds. The set also has significant depth in energy, banking and insolvency, and has undergone recent growth in climate change and crypto work, areas which Carroll envisages will keep on expanding in together with its other focus areas, through lateral hires.

On the civil fraud side, Stephen Atherton KC recently acted for the first and fifth defendants in litigation in the British Virgin Islands, including a four-week trial, in a case concerning alleged fraud involving lumber companies operating in Malaysia and Indonesia. Elsewhere, on the public international law side, Daniel Bethlehem KC acted for The Republic of the Marshall Islands in its request for the release of a vessel arrested by Equatorial Guinea in the EEZ of a third State (São Tomé and Príncipe).

The set has grown by about 35% in the past seven and a half years. But growth is not just restricted to barristers; the clerking team, known here as the practice management department, has also expanded. Carroll explains the team is run “a bit differently and more modernly than other Chambers,” split into three different sectors of industry, each with a head practice director. The goal is “to provide a more streamlined experience for clients. As they can call us and be put through to a specific clerk well-versed in the matter at hand.”

The Pupillage Experience



At Twenty Essex, the pupillage is divided into four different seats, which, according to Kenny, “are not unlike school term times.” The aim of the first seat is largely to watch your supervisor and participate in their practice as much as possible. Kenny likens the experience to “a baby duck behind a mummy duck, you follow your pupillage supervisor around and do their work and go with them to every conference. You will work on the pleadings and skeleton arguments they’re working on.” By the second and third seats, you are encouraged to work with supervisors across chambers. Supervisors are matched to pupils through a mixture of interest, personalities and availability.

“…they take the view that pupillage is for you, and that you need to be doing the tasks you would do as a tenant and barrister.”

A pupil’s work is predominantly ‘live’ work, mixed with set training exercises to develop certain skills. The work mirrors that of a practising barrister, so there is a lot of pleadings, advice and skeleton arguments, as well as research notes. We were told by someone who had gone through the process that “they take the view that pupillage is for you, and that you need to be doing the tasks you would do as a tenant and barrister. So, they are constantly checking: have you done enough pleadings, have you covered this area of law?”

The second six at Twenty Essex is non-practising, but this is supplemented with four advocacy exercises that take place over the course of the year. These take place with another pupil but rest assured, it’s not a case of being assessed directly against each other. According to Kenny, these are usually real cases which have been adapted. During the exercise, pupils are asked to create a skeleton argument around a week before and then argue it for about 40 minutes.

A current pupil gave us the inside scoop, telling us: “The first one was daunting, as you don’t know what to expect. But then you start to enjoy them because it feels like your own little case. It’s funny seeing senior members of chambers who are so friendly and nice put their judge mask on.”

“There was active dialogue with my supervisors about how I could improve, who I could work with in chambers and what kind of work I could do to demonstrate the skills I had gained.”

The assessed period runs from September to early July, across a pupil’s first three supervisors, with an unassessed two months after the pupillage decision. During this time, each task a pupil does is assessed and marked to show where they are in relation to the tenancy standard. However, as one pupil explained: “There’s no expectation that you should be reaching that standard from the start, nor to have a particular average mark. It was very rewarding to notice things I found extremely difficult at the beginning; I now find them easy and obvious because of the feedback I have been given.”

One junior tenant, reflecting on their experience, also told us: “There was active dialogue with my supervisors about how I could improve, who I could work with in chambers and what kind of work I could do to demonstrate the skills I had gained. They try to make it interactive and to bring you into the process of your learning.”

Alongside this, the junior tenants currently run a formalised teaching programme which brings together areas of law a pupil may not come across as readily, such as aspects of international arbitration. There are around eight to ten sessions per year, with lectures from senior members of the chambers.

When it comes to the tenancy decision, the general consensus was that it never felt like a competition against fellow pupils, leaving plenty of room to “form a relationship with your co-pupils as you know there is space for everyone.” Kenny explains that: “we take the view that we put a lot of effort into finding and recruiting pupils, so we try to take them on where we can.”

One pupil who had recently been retained told us that the lead-up to the decision was considerably less daunting as a result of having a clear idea of where their scores sat against the tenancy standard throughout the assessed period. We heard decision day is “a real celebration and a happy moment for us.We had champagne on the terrace, and a lot of members came to shake our hand and talk to us.”

“The hours have been standardised,” one pupil told us, “and there is a lot of transparency around that.” Pupils work 9am to 6pm and we heard that there’s never an expectation to work over the weekend: “The point is that we have a strict rule in pupillage: you work normal working hours and you do not take work home,” a junior added.

The Application Process



The major selling point of Twenty Essex’s application process is simpler than you might think. As one pupil put it: “It didn’t take too long!” Anyone who has had to navigate a lengthy application process will understand the appeal straight off the bat, and it’s by design rather than by accident: “We don’t want the application process to be a whole career in itself,” Kenny tells us, “we want it to be relatively undemanding on the candidate’s time.”

The process itself consists only of an application form and an interview, though it’s worth noting that all candidates must complete a mini pupillage at the set before applying, so Kenny advises “keeping an eye on application dates.” Yearly, there are around 200 applicants for pupillage, which is then narrowed down to about 25 at the interview stage.

“It’s the same game you’ll be playing once you’ve been taken on. It’s about being as succinct, precise and logical as you can be, and communicating that with a bit of good humour.”

The interview is based on a fantasy legal situation. In 2025, it was about “a new Criminal Code in Greenland after the US theoretically bought it.” One pupil advised that you should try to think: “am I coming up with a realistic and sensible solution to the problem?” The general consensus was that the process is intellectually stimulating, and candidates are provided with both the problem question and the marking scheme in advance. “It’s the same game you’ll be playing once you’ve been taken on,” Kenny adds, “it’s about being as succinct, precise and logical as you can be, and communicating that with a bit of good humour.”

“Everyone is so nice here,” one pupil told us, “it’s something we take for granted. We all got emails from senior members of chambers telling us they look forward to working with us.” There are also drinks every Thursday evening, and “I genuinely feel like I could call anyone in chambers and go and ask them a question and they’d be happy to help. There’s a strong sense of community.”

A piece of cake…

There are informal weekly events such as ‘cake day’ every Wednesday at 3pm, and, before you ask… the cakes rotate each week.

Twenty Essex

  • No of silks 44
  • No of juniors 77
  • No of pupils 4
  • Contact pupillage@twentyessex.com
  • Method of application Pupillage Gateway
  • Pupillages (pa) Four 12-months pupillages
  • Minimum degree 2:1 (law or non-law)
  • Award £80,000
  • Tenancies offered in the last three years 100%; 95% over the past five years

Chambers profile



Twenty Essex is an innovative, modern commercial barristers’ chambers, occupying an unrivalled position both at the leading edge of high-profile and complex commercial litigation and arbitration, and at the intersection of commercial litigation and public international law.

Our members are at the forefront of developments in key growth areas across the commercial space including in international arbitration, banking and finance, climate change, energy and the environment, global trade, and technology, cyber and crypto. In this way, we are continuing to build a team that is up to the challenge of responding to the scale, urgency and complexity of contemporary, global public life.

Some of our barristers’ key recent cases include:

• Public Institution For Social Security v Al Rajaan and others (The Lawyer Top 20 Cases of 2025)

• R (on the application of Al-Haq) v Secretary of State for Business and Trade (The Lawyer Top 20 Cases of 2025)

• Alcatel Lucent v Amazon (The Lawyer Top 20 Cases for 2025)

• Município de Mariana & Others v BHP Group (UK) Ltd and BHP Group Ltd (one of the largest claims ever brought before the England and Wales Courts)

• P&ID v Nigeria (‘Most Important Decision’ award at GAR Awards 2024)

• Mozambique v Credit Suisse, Privinvest & others (The Lawyer’s Top 10 appeals of 2024)

• Czech Republic v Diag Human and Josef Stava (The Lawyer’s Top 20 cases of 2024)

• Crypto Open Patent Alliance v Dr Craig Steven Wright (The Lawyer’s Top 20 cases of 2024)

• Duarte Agostinho v Portugal & others on global climate change

• UK P&I Club v Venezuela (‘The Resolute’)

• Ukraine v Russian Federation before the ECHR


The nature of members’ practices is truly international: since 2009 we have maintained a fully staffed annexe in Singapore, and our members are instructed on cases centred on events in countries around the globe.

We continue to grow, including through a strong pupillage programme (and mini-pupillage programme), as well as lateral hires from around the world at all levels of call.

And as a chambers, we have been in the vanguard of changes in how the Bar operates, seeking to continually improve both the service we provide to clients, and how we build a strong, positive and supportive team across the set. For future barristers, this includes supporting public events such as ‘Black Excellence at the Bar’, as well as running our own in-house networking events for students and young people, with a particular focus on groups who are under-represented in the commercial bar.

Pupil profile



Pupillage at Twenty Essex offers the opportunity to train with barristers at the top of their profession in a highly successful, international and friendly set at the cutting edge of commercial and public international law. We do not just test: we teach.

We are focused on providing our pupils with the best possible training to succeed at the Bar and we work hard to ensure that their day-to-day experience is rewarding and beneficial. We are proactive and engaged in broadening access to the Bar, and we actively encourage people from all backgrounds and life paths to apply. We were the first chambers to adopt Rare’s CSR.


Our aim is to recruit pupils of exceptional ability who are interested in our fields of work and will stand an excellent chance of being offered tenancy.


We are looking not only for intellectual ability but also the other attributes that make for a successful barrister, such as strong interpersonal and communication skills, and an ability to collaborate and deliver consistently excellent client service. We are equally receptive to applicants with law and non-law degrees, and those moving career.

Pupillage is our chance to teach you to excel as a junior barrister. We are proud of our bespoke training programme and its fantastic results: in recent years, 100% of our pupils have been offered tenancy at the end of their pupillage.


Please note that applicants must have completed or been offered a mini-pupillage at Twenty Essex in order to be considered for a pupillage.

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This Firm's Rankings in
UK Bar, 2026

Ranked Departments

    • Cryptoassets (Band 1)
    • Offshore (Band 4)
    • Banking & Finance (Band 3)
    • Commercial Dispute Resolution (Band 2)
    • Energy & Natural Resources (Band 3)
    • Environment (Band 3)
    • Fraud: Civil (Band 2)
    • Insurance (Band 3)
    • International Arbitration: General Commercial & Insurance (Band 2)
    • Public International Law (Band 1)
    • Restructuring/Insolvency (Band 4)
    • Shipping & Commodities (Band 1)