官方原文通知是:
If the visa you’re applying for asks you to prove your English language ability and you’re taking a test:
---on or before 5 April 2015, you should use ‘List of approved tests and providers: up to 5 April 2015’
---on or after 6 April 2015, you should use ‘List of approved tests and providers: from 6 April 2015’