It boils down to this: it seems there's a new listing on Amazon UK for Zulu:http://www.amazon.co.uk/Zulu-Blu-ray-Stanley-Baker/dp/B00ID50V8KRelease date is 5 May 2014, no cover art, no details on whether it's a new transfer or not, just that it's being released by Paramount.
Saw this new release in the shop today, it's labelled a 50th anniversary release, absolutely no mention on the cover, front or back, of a new transfer so i assume it's just a recycled release, if anyone buys it and finds it's different please let us all know.