CAT 111 - All quite possible, of course, but I fancy that my 'problems' are more of my own making (read 'dim as a Toc H lamp') than external influences.
I have, in fact, made some progress - the Nexus now connects with no problems as does the Dell laptop. However the Advent, sitting alongside the Dell stubbornly refuses to connect, in spite of showing 'excellent' signal strength. The attempts at using the 'repair' function in the networks dialogue box consistently generates the 'unable to renew the IP address' message. Struggled miserably down
that particular avenue the last time I tried to set the thing up.
The brain is now ultra weary and the eyes also, so I think I shall leave well alone and accept two out of three as a good result!!