If you go to
Publications with Titles Containing : cap493 | Publications | About the CAA the current version is Sixth Edition, Ammendment 1 (4th February 2015). I can't find any communication from the CAA that suggests that version was withdrawn. Surely if that's the version the regulator lists then that's current.
NATS however took issue with some aspects of it and had an instruction to its controllers to continue to operate to the previous October 2014 version (they had consulted with, and had approval from the CAA to do this). This instruction even stated that other non-NATS agencies may be operating as per the February 2015 version.
Either way it's a mess.