Q24 cont:
Many gender-questioning children will be intending to physically transition later in life, which means they have the protected characteristic of proposing to undergo gender reassignment. The EHRC states that deliberately misgendering a trans person (using the wrong pronouns) is unlawful harrassment.
(https://www.equalityhumanrights.com/equality/equality-act-2010/your-rights-under-equality-act-2010/gender-reassignment-discrimination). Therefore, a school outright refusing to use the chosen pronouns of a child who has the protected characteristic is illegal.