Ah, thanks for the reply but I've just realised what was going on.
At first I was seeing was this...
This was after I had to reboot the machine to the last know good configuration when it refused to boot due to a 'necessary device being inaccessible'.
As my internet was previosly working properly and connects automatically I had not had any reason to look too closely at its icon so maybe these have been there all along without me noticing but on closer inspection today I now see I have some connections left over from when I was playing with Virtual box and VMplayer recently.
I dind't notice these yesterday but if I click on them in Network and sharing centre and select to disable them that gets rid of the unidentified connection message.
Thanks for responding so quickly anyway :-)