It seems to be working quite well now (ignoring the WiFi issue).
Powered USB 3.0 hub is running
USB to HDMI adapter
Ethernet adapter
Sound adapter
Keyboard/mouse
Not yet tried two USB-HDMI adapters again.
For less than £20 I've managed to put together (with a lots of wires hidden away) something like the £100+ docks.
EDITED: 16 Sep 2016 10:12 by ANT_THOMAS