Some users receive their phones with a newer firmware that the one posted on orange web site. If you try to "upgrade" (better say downgrade)
the software it will write a byte in firmware, forcing phone to go to bootloader so the upgrade it will proceed. Because the Orange UK upgrade is old it will not have the correct password to continue the upgrade so phone will stay always in bootloader!!!!
Download the attachment and follow the instructions from the READ.ME inside the zip.
Read more, and download the fix here.