OK, looks like a case of user error here I'm afraid! Can't say the manual was too explicit and helpful in the setup procedure tho...
Looks like I had selected DAB option, expecting it to then automatically pickup what ensembles were available, and was frustrated when all it ever showed was no signal. I didnt realize that you had to then scroll to Autostore & click where it indicated No Signal, revealing Scan as a hidden option... Clicking scan then allowed the module to discover the broadcast ensembles..
Hope this helps any others stumped at first..
Now that I have the stations (in profusion!) I am very happy with what I have found. I think that the bitrates of many of them could (& should) be better, but the choice is excellent (at least 50 stations here in London), and I am delighted with the ability of the signal to carry info on the tracks & artists. Along with the 6FL its terrific to have so much entertainment choice at last!
Dan