http://bigmag.co.uk/plane/q_a/level_tables/eng_table/
Check out this link - If you are only able to utter your name, then work hard!!! If you can string words together in fits and starts and generally fit into Level 2 then still work hard!!! If you may fit into the Level 3 criteria, check with your employer or authority to see if you have an extension (if not then work hard, if you do then why not also work hard and aim for Level 5 by 2011 - certainly dont put it off until 2010!).
My advice is to speak with, and listen to as many fellow crews as possible, maybe take some lessons if you feel you need them, but generally just work on speaking as much English as possible.
Good luck to all!