I've read & re-read all the fascinating contributions to this thread & it certainly looks as if I have very little to worry about. The wi-fi drop outs are an irritation I could do without, but in the grand scheme of things, a pretty minor irritation when all's said & done! As Foolestroupe says: "Life goes on..." I'm very grateful to all of you who took the time & trouble to post, thank you,
                  Nigel P.