What is latest Navman uk map?

[FreeEnergy]

What date/what version is the LATEST UK map for the 520? Navman sell them of course, but DON'T state on their web site a version or date. So how do I know when it was made? Obviously I don't want to waste money?!!
Also, if anyone HAS recently bought the latest UK maps, who is offering the best deal or discount (if any, and legally of course!) Thanks!

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