Indirect Discrimination

Indirect discrimination is when a written or unwritten workplace policy or house rule (the Equality Act calls it a provision, criterion or practice (PCP)) applies to everybody, but the PCP has the worst impact on you and other people in your workplace with a particular protected characteristic, and;

you are a person with that particular protected characteristic
you have been or would be disadvantaged by the PCP, and
it is not a proportionate means of achieving a legitimate aim.

If your employer does not change the decision or stop implementing the PCP then this would be indirect discrimination.