- any sixth form names would help.
Most sixth forms should let you, as long as you have your English GCSE and enough other GCSEs to qualify you for entry (usually around 5, although it can vary). The sixth form I go to does, although mine is part of my high school and not a separate one (ie sixth form colleges/centres), so maybe look out for that. You'd need to provide your location for people to be able to help you with specific sixth forms.
Westminster King’s way I think