The info above is right, you have no level written as you have the automatic grandfather rights which allows you to be level 4. This automatic right expired on March 5th this year by which point your current employer, or you independently, should take the formal test approved by your national CAA. The UK CAA has approved a couple of tests so far. Sometimes level 6 can be confirmed (in an informal conversation, not formally tested) at Sim Checks in the UK. However if there is any doubt of level 6 by the instructor, you will be referred back to a formal test centre to ascertain if you are indeed level 6. Hope that helps.