As you can see in the image above, both O2 UK (left) and LG Hellas (right) made it clear that there are no plans for the update, at-least for now. While no additional details were provided, it could be that the company may just be planning a jump straight to Android M for its latest flagship, too.
Meanwhile, Samsung's latest Galaxy S6 duo flagships have started receiving the Android 5.1.1 update - it is currently rolling out to T-Mobile and US Cellular units in the US. In addition, the S6 is getting it in France, while the S6 Edge is getting it in the UK.Source 1 2 | Via (In Greek)
+1 , totally agree!
It does not say that they aren't going to update either phones. They just don't have details from the higher levels yet. Even Sprint in the US has no details on when the updates will be, but there is still a chance for the phones to receive 5.1.1.