I have an 8320 Curve on Orange in the uk. Can any one kindly tell me if the nes operating system is available from orange yet? Thanks very much in advance.

Not from Orange, no.

This is the latest OS for the 8320. It doesn't matter what carrier the OS comes from as long as you remove the vendor.xml file from your PC.
http://www.blackberryforums.com/gene...languages.html

Follow the instructions and you will be fine.