Qualified Teacher Status
Qualified teacher status (QTS or QTLS) is required in England and Wales to work as a teacher of children in state schools under local authority control, and in special education schools. A similar status exists under a different name in Scotland and Northern Ireland.
You must have qualified teacher status (QTS) to take up a teaching post in England in a:
maintained primary school
maintained secondary school
maintained special school
non-maintained special school
For further reading, please see https://www.gov.uk/guidance/qualified-teacher-status-qts