This uniform exchange scheme is run by the school PTA. Offering free (or donate-as-you-feel) items of uniform in good condition. Contact the school office firstname.lastname@example.org to let them know what you need or can offer to the Uniform Exchange project.
If you get in touch but they can’t help you, try LS16 Community Uniform Exchange Facebook Group or Uniform 4 All North West Leeds Facebook Group as they may cover this school. Their details are listed in the Facebook Pages section. You may also want to try one of the Community Exchanges as they hold generic uniform stock. or put a post on FB group.