Why can I not take a CTFL v3.1 (2018) exam or CTFL v3.1 (2018) accredited training in English after 9th May 2024?

I prepared for the CTFL v3.1 English exam and now I will have to take the v4.0 exam - what are the differences?

I need to retake my CTFL v3.1 (2018) exam - what do I do after the sunset date (9th May for English)?

I am an accredited training provider for CTFL v3.1 (2018) – do the sunset dates apply to training?

Is my CTFL 3.1 (2018) certificate still valid after retirement of the syllabus?

Who is the intended audience for ISTQB® Certified Tester Foundation Level?