Added standardised SEN fields

[rmbielby]

Overview of changes

I've created a set of standardised special educational needs filter entries based on the School Census guidance (which is where most stats producers source their SEN data) and review by the data harmonisation champions group.

Why are these changes being made?

We want to create consistent standards across DfE data sets.

Detailed description of changes

I've added details of the standardised SEN filters in the Open data standards page alongside ethnicity and sex.

Issue ticket number/s and link

Checklist before requesting a review

• [ ] I have checked the contributing guidelines
• [ ] I have checked for and linked any relevant issues that this may resolve
• [ ] I have checked that these changes build locally
• [ ] I understand that if merged into main, these changes will be publicly available

[rmbielby]

Looks good, nice and clear. One minor typo.

Can I check what teams have been represented in the group that's had a chance to see this?

Teams represented by people who have had a chance to review or definitely reviewed this would be: School census Children Looked After KS5 attainment FE Workforce Primary attainment

And there's another layer of review as we can publicise this whilst we're developing the screener to actively check these.