I can't understand why the CAA doesn't accept GCSE or O-level English as proof of Level 6 language competence.
Because I suspect looking at the average age of pilots, most could not remember the exams they sat let alone provide proof of them.
I really do not see what people are getting worked up about. Everyone got LVL 4 automatically, everyone will get LVL 6 automatically as part of revalidation. Between now and then there is absolutely nothing to worry about.
I do find the English habit of loving rules and regulations to death highly amusing.