On Mac OSX 10.13.6 using VirtualBox 5.1.38 with latest Vagrant created box debian/stretch64 (v9.5.0) and patched .zip created.

Hadn't appreciated that processor using Ubuntu 16.04 LTS now too old to support virtualisation which wasted a bit of time.

Having now installed to F5321 a couple of points which may save others some time. Firstly I found only satisfactory method of TA Backup was using backupTA_v2 under Windows and also had to install legacy Xperia X Compact driver from:https://developer.sony.com/file/down...ria-x-compact/ to get Androxyde Flash Tool to recognise device.