[nomadking]

Originally Posted by Russ

I'm pretty certain that if it genuinely was "discrimination" then the Equalities and Human Rights Commission would be all over it.

I presume they're not? That's because it isn't discrimination.

Equality and Human Rights Commission, Article 14.

Discrimination occurs when you are treated less favourably than another person in a similar situation and this treatment cannot be objectively and reasonably justified.
...
What type of discrimination does the Act protect you from?The Human Rights Act makes it illegal to discriminate on a wide range of grounds including ‘sex, race, colour, language, religion, political or other opinion, national or social origin, association with a national minority, property, birth or other status’.
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Does the right cover indirect discrimination?The courts have also ruled that the human rights protection from discrimination includes indirect discrimination. This occurs when a rule or policy, supposedly applying to everyone equally, actually works to the disadvantage of one or more groups. For example, a requirement that all employees be over six feet tall may be indirect discrimination. Women and some disabled people will be disadvantaged and to be justified this would need to be a strict requirement for the job.

Immigration Act 2016

77English language requirements for public sector workers
(1)A public authority must ensure that each person who works for the public authority in a customer-facing role speaks fluent English.