Go to My OSMC → Logs with the stick and post the URL here. It should let us see what’s going on.
As always, we can swap the unit over or refund.
Channel services in UK are presently dodgy, see [HowTo] Retune TVHeadend DVB for UK Freeview digital switchover.
I assume you have ran these scans without anything attached to the USB (could be power issues)
Sam