My fault in a way. I didn't test everything and thought it was best to rectify the problems rather then be out of pocket sending the item back to China at my own expense and then having to wait several weeks for them to replace the item if they decided it was broken.
Anyway. Good news on the HDMI and OTG score. Mini HDMI cable bought from Ebay kept giving a check cable error, typical of my luck. I used a mini to standard adaptor, plugged in a standard HDMI cable and the error message now doesn't appear.
USB OTG was also a cable issue. Bought 2 OTG cables of different design, the first 2 didn't work. Popped into my local phone shop and bought another cable for a little more. Now it works like a dream. I now have my hub plugged into it and its working with mouse, keyboard and flash drive.