Evening. Thought I'd have a late night go. Sadly,despite following instructions to the letter and the box causing the USB to illuminate, incidentally it's a USB 3.0 8gb so I tried front and rear slots, the box is resolutely stuck on boot. Really no sign of any developments at all.
Thanks for trying to help, all I can hope for now is that my installer will drop by at some point. In the meantime it's back to the old sky Hd box and using a family member's Sky Go kindly lent to me.