You might think religion and belief discrimination at work is straightforward. Someone follows a recognised faith, you treat them less favourably because of it, and that is discrimination. Job done.

But the reality is considerably more interesting than that, and the legal definition of a protected “belief” under the Equality Act 2010 is wider than most business owners realise. Wide enough, in fact, that we are going to use Darth Vader to illustrate the point. Bear with us.

The Law in Plain English

Under the Equality Act 2010, religion or belief is one of nine protected characteristics. You cannot discriminate against someone at work because of their religion, religious belief or philosophical belief, and that protection also covers people who have no religion or belief at all.

The religion part is fairly self-explanatory. Christianity, Islam, Judaism, Hinduism, Sikhism and so on are all clearly covered. But it is the “philosophical belief” element where things get more complex, and where businesses most often get caught out.

The Act itself does not define what counts as a philosophical belief. That has been left to the courts to work out, case by case.

The Five-Part Test: The Grainger Criteria

The leading case on this is Grainger plc v Nicholson [2010], where the Employment Appeal Tribunal set out a five-part test that a belief must pass in order to qualify for protection. These are known as the Grainger criteria, and they apply every time someone claims their philosophical belief has been discriminated against.

To be protected, a belief must:

1. Be genuinely held. It cannot be a convenient invention or something adopted for the purposes of a claim. The person must actually hold it sincerely.
2. Be more than an opinion or viewpoint. A belief based purely on present available information is different from a philosophical belief. It needs to be something deeper, more settled, more fundamental to who that person is.
3. Concern a weighty and substantial aspect of human life and behaviour. Trivial preferences do not count. The belief needs to engage with something that matters, something that shapes how a person lives.
4. Attain a level of cogency, seriousness, cohesion and importance. It needs to hang together as a belief system and carry some gravity. Random or incoherent views will not pass this test.
5. Be worthy of respect in a democratic society. It must not be incompatible with human dignity or conflict with the fundamental rights of others. This is where extreme views can be excluded.

The key thing to understand about this fifth criterion, following the Court of Appeal’s decision in Forstater v CGD Europe [2021], is that the bar is set very low. Only the most extreme beliefs will fail it. Something can be controversial, deeply offensive to others, or widely disagreed with and still be protected. That may feel uncomfortable, but it reflects the importance placed on freedom of belief in a democratic society.

Key point for employers: A belief being controversial or offensive is not enough to strip it of legal protection. Only beliefs that are truly extreme, akin to Nazism or inciting violence or hatred, will fall outside the law’s protection.

Why This Matters: The Ethical Vegan Case

To see how this plays out in practice, look at the case of Casamitjana v The League Against Cruel Sports [2020].

Jordi Casamitjana was employed as a senior policy officer by the League Against Cruel Sports. He discovered that the organisation’s pension fund was invested in companies involved in animal testing, and he raised concerns with colleagues. He was subsequently dismissed, and he claimed this was because of his belief in ethical veganism.

Before the tribunal could decide whether he had been discriminated against, it first had to answer a more fundamental question: is ethical veganism a philosophical belief protected by the Equality Act?

The answer was yes, overwhelmingly so.

The Employment Judge found that Mr Casamitjana’s ethical veganism met every part of the Grainger test. His veganism governed almost every aspect of his life: what he ate, what he wore, what products he used, where he shopped, and even how he travelled. He would choose to walk rather than take a bus because of the risk of insects being struck by the vehicle. His belief in the moral wrongness of exploiting animals was genuinely held, serious, coherent, and deeply embedded in who he was as a person.

It is important to note that not every vegan would necessarily be protected in the same way. Someone who follows a plant-based diet for health reasons, without any deeper ethical conviction underpinning it, is unlikely to meet the test. The protection is personal and fact-specific. It is about this individual and their belief, not about the category of belief in the abstract.

The case eventually settled, with the League Against Cruel Sports acknowledging that Mr Casamitjana had done nothing wrong and that his dismissal was connected to his ethical beliefs.

Practical takeaway: If you have employees who are ethical vegans, you need to treat that belief with the same seriousness as a religious one. Harassment, mocking comments, or failing to accommodate reasonable requests connected to that belief could expose you to a discrimination claim.

Now, About Darth Vader…

This is where it gets genuinely interesting, and we promise this is not just a gimmick.

There are real people in the world who follow what might be called “Sithism” or the philosophy of the Dark Side. Drawing on the teachings of Star Wars, some individuals treat the Sith code as a genuine philosophical framework for how they live their lives. Academic research has documented real-world Sith-inspired movements whose followers treat the principles of the Dark Side as a serious guide to personal development, self-discipline and the pursuit of individual power and excellence.

So the question is: could a belief in the teachings of Darth Vader and the Dark Side of the Force meet the Grainger criteria?

Let us run it through the test.

• Genuinely held? Potentially yes, for some individuals. The question is whether this person truly structures their life around these principles, or whether it is more of a hobby or pop culture enthusiasm. That distinction matters.
• More than an opinion? A true follower who treats the Sith code as a moral and philosophical framework, not just as something they find interesting, could arguably pass this. But someone who simply likes Star Wars would not.
• Concerning a weighty aspect of human life? The Sith philosophy engages with questions of power, self-determination, ambition and the relationship between individuals and authority. These are not trivial themes. Whether a tribunal would find them “weighty” in the required sense is debatable, but it is not obviously impossible.
• Cogent, serious and cohesive? The Sith code is a coherent set of principles. Whether following it in real life reaches the required level of seriousness would depend heavily on the individual and how central it is to their life.
• Worthy of respect in a democratic society? Here is where the Dark Side runs into its biggest problem. The Sith philosophy is rooted in domination, the suppression of others, and the pursuit of power through any means necessary. A tribunal would have serious grounds to find that this conflicts with human dignity and the fundamental rights of others. Not because it is extreme in a political sense, but because the core values of the Dark Side are in direct conflict with the rights-based framework the fifth criterion is designed to protect.

Could a follower argue that their real-world application of Sith philosophy is actually about personal discipline and self-mastery rather than oppression? Possibly. That kind of nuanced argument is exactly what a preliminary hearing would need to explore.

The verdict: A Darth Vader or Sith-inspired belief is unlikely to achieve protected status in its purest form, because of the fifth criterion. But the exercise illustrates just how broadly the law casts its net, and how genuinely difficult these assessments can be in practice.

What Does This Mean for Your Business?

Here are the practical points to take away from all of this.

• The list of protected beliefs is not fixed. Courts and tribunals have found protection for beliefs including ethical veganism, belief in man-made climate change, gender-critical beliefs, anti-Zionist beliefs, democratic socialism and opposition to critical race theory. The list continues to grow as new cases are decided.
• Lifestyle choices are not the same as beliefs. Dietary preferences, political opinions casually held, or fashionable viewpoints are not enough. But where a person can show their view is deeply held, serious and shapes how they live, the law is likely to protect it.
• The fifth criterion is not a catch-all. You cannot dismiss a belief as unprotected simply because you find it offensive or disagree with it strongly. It needs to be extreme in the sense of being akin to totalitarianism or inciting hatred before it falls outside the protection of the law.
• Protection for a belief does not mean protection for all behaviour. A belief being protected does not give someone the right to behave however they wish. An employer can still address behaviour that harasses or discriminates against others. The belief is protected; the conduct is a separate question.
• Treat unusual or unfamiliar beliefs with caution. If an employee raises a belief you have not encountered before, do not dismiss it out of hand. Take it seriously, seek advice if needed, and consider whether any steps you are proposing to take could be connected to that belief.

A Final Thought

The law in this area is genuinely evolving, and the Grainger criteria, while well established, are applied afresh to every new belief that comes before a tribunal. What would have seemed absurd as a protected belief a decade ago might be protected today.

The sensible approach for any business is not to try to assess whether a particular belief qualifies for protection on your own. If an employee raises a concern connected to their religion or belief, take it seriously, document it carefully, and take legal advice before acting.

Because in a world where ethical veganism is a protected characteristic, you really cannot be too careful about where you draw the line.

Need advice on religion or belief discrimination in your workplace? Get in touch with our team for a straightforward conversation about your options.