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| Are Cathcarts and Taylor & Byrne Real Law Firms? Is Johnny Warren Based on a Real Lawyer? |
The law firms at the centre of HBO’s War may look like the sort of elite London practices that would happily bill you for breathing near their reception desk, but Cathcarts and Taylor & Byrne are fictional. The same goes for Johnny Warren, the young lawyer whose career takes a particularly questionable turn when he is planted inside the rival firm. George Kay’s legal drama borrows from the atmosphere and tactics surrounding high-profile divorce battles, but its main players and firms were created specifically for the series.
Created by George Kay, War follows the increasingly hostile divorce between tech billionaire Morgan Henderson and international star Carla Duval. Their marriage has survived years of Morgan’s infidelities, but Carla eventually reaches the point where another apology is apparently not going to fix things. Once divorce becomes inevitable, the legal battle quickly becomes almost as important as the marriage itself.
Carla is represented by Taylor & Byrne, a young firm run by married lawyers Nick Taylor and Serena Byrne. Morgan, meanwhile, turns to Cathcarts, a more established outfit that has previously worked for both sides. The two firms quickly become locked in their own professional contest, with information, strategy and loyalty becoming valuable commodities. It is less “let's resolve this sensibly” and more “let's see who can make the other side sweat first”.
Despite the recognisable setting, neither Cathcarts nor Taylor & Byrne is based on a specific real law firm. Kay drew inspiration from the wider world of celebrity divorce and the lawyers who become highly visible when wealthy or famous couples decide to separate. The series takes those real-world ingredients and turns them into an entirely fictional contest between Morgan, Carla and their legal teams.
Kay has previously explained that the idea for the drama emerged after he saw a woman celebrating the conclusion of a long divorce. He was already interested in developing a legal drama, and the emotional and financial chaos surrounding a high-profile separation provided the foundation. During the early development of War, he also examined prominent celebrity legal disputes, including the widely reported case involving Johnny Depp and Amber Heard.
That research, however, was not used to simply recreate one particular divorce on screen. Instead, it helped Kay explore how high-profile lawyers operate when enormous reputations, money and personal stakes are involved. The lawyers themselves became an important source of inspiration, particularly the strategies, negotiations and competitive instincts that can shape these cases.
That distinction matters because Morgan Henderson and Carla Duval are fictional characters, rather than disguised versions of a specific real celebrity couple. Their marriage might feel familiar because celebrity divorces often involve overlapping themes of wealth, public image and competing legal strategies, but there is no indication that the pair represents one particular real-life couple.
The same approach applies to the show's legal practices. Cathcarts is fictional, as is Taylor & Byrne, and their rivalry was designed to create another layer of conflict beyond Morgan and Carla's collapsing marriage. Rather than making the law firms simple background scenery, Kay uses them almost like competing characters, with their own ambitions, personalities and internal problems.
Taylor & Byrne is particularly interesting because its two leading lawyers are married to each other. Nick and Serena spend their professional lives together while also dealing with the arrival of a baby, all while attempting to establish their relatively new firm. Their situation provides a deliberate contrast to Morgan and Carla, whose marriage has deteriorated partly through distance and betrayal.
So while Morgan and Carla can barely remain in the same emotional universe, Nick and Serena are effectively living and working together around the clock. It is hardly the relaxing version of married life either. Imagine running a new law firm with your spouse while preparing for a child and simultaneously taking on the kind of case that could make or break the business. Apparently, someone in the writers' room decided ordinary work-life balance was far too peaceful.
The production also used legal consultants to help make the courtroom and divorce elements feel credible. That allowed the writers to build fictional characters and situations while keeping the professional environment grounded in the way divorce lawyers actually approach complicated cases. The result is a drama that is fictional without treating the legal world as a completely imaginary playground.
Then there is Johnny Warren, whose story provides the series with perhaps its clearest link between the enormous world of Morgan and Carla and someone much closer to the ground. Johnny is a young lawyer struggling to get his career started. After months of unsuccessful interviews, he finally gets an opportunity with Taylor & Byrne and appears to have landed the break he desperately needs.
Except there is a rather large catch.
Johnny has already been recruited by Cathcarts. His assignment is to get inside Taylor & Byrne and secretly pass information back to the rival firm. In other words, his first proper legal job comes with the slightly awkward requirement of becoming a mole. Not exactly the sort of detail you would normally put on a CV under “additional responsibilities”.
Johnny Warren is also entirely fictional. Kay created him as a way of bringing an ordinary young professional into a world dominated by billionaires, celebrities and powerful lawyers. Morgan and Carla have enormous resources and public profiles, while Johnny is simply trying to establish himself and prove that he belongs in the room.
His position makes him one of the show's most useful characters because he is not initially driven by the same interests as the people around him. He wants recognition, stability and a chance to prove himself. Unfortunately, once he accepts Cathcarts' offer, those understandable ambitions begin pushing him towards decisions that become increasingly difficult to justify.
Kay has said that the idea of making Johnny a mole came from looking for a way to create a stronger connection between the two rival firms. Rather than having Cathcarts and Taylor & Byrne compete only through their clients, the writers gave them a human link inside the opposing camp. Johnny becomes that link, and his presence allows information to move between the firms while also creating a much more personal source of tension.
Actor Archie Renaux, who plays Johnny, was reportedly a major part of why the character works. The role appealed to him because Johnny is not simply a straightforward ambitious lawyer. He is caught between wanting to succeed and gradually discovering how much he is willing to sacrifice in order to do so.
That duality becomes increasingly important as the season progresses. Johnny starts out as someone desperate for an opportunity, but his involvement with Cathcarts places him in situations where every decision has consequences. One questionable choice leads to another, and the line between ambition and betrayal becomes increasingly difficult for him to ignore.
My take is that War works better when its fictional status is kept in mind, because trying to match every character to a real celebrity or lawyer misses what the series is actually doing. The drama clearly borrows the atmosphere of famous divorces, but it is more interested in the machinery behind them than in recreating a particular scandal. I also like the decision to make Johnny fictional rather than turning him into some obvious real-world counterpart.
His story gives the show a slightly scruffier human angle amid all the money, expensive offices and people who probably consider a six-figure legal bill a minor inconvenience. The Cathcarts versus Taylor & Byrne rivalry can occasionally feel deliberately theatrical, but that is part of the fun. It turns divorce into a professional battlefield without pretending every scene is a documentary about British law. For me, Johnny is arguably the more interesting piece because his mistakes actually cost him something personally.
So, if you were wondering whether Cathcarts is a real law firm, the answer is no; Taylor & Byrne is fictional too, and Johnny Warren is not based on a real lawyer. They were created for Kay's story, with real-world celebrity divorce cases providing some of the broader inspiration rather than serving as direct templates. And considering how badly things can go for Johnny, perhaps fictional law firms are safer for everyone involved. What do you think of Johnny's choices, and do you reckon War would work just as well without the mole storyline?