Oh, two other things...

1: it's really not me who needs to polish up on their language awareness now is it, Mr Hit the Nail on the Hat! Haha!

2: The TKT is primarily for non-native speaking teachers of English. It was offered at EFDL and I opted to sit it purely for my own development, which probably explains why I received band 4 results across the board.

It's also worth noting that the TKT is a qualification awarded by Cambridge ESOL, which you claim has no validity and is associated only with corporate education... And yet in this post you are recommending it!
http://www.cambridgeenglish.org/teaching-english/teaching-qualifications/tkt/

Now that is a good example of "hypocrisy of the highest order"!