I have an idea that the Leslie surname is one that came to Orkney from people who moved to Orkney from Fair Isle. There are people on Westray (one of the north isles of Orkney with the surname Leslie.
Hi again Corinne, thanks for the tip. I am living in Spain at the moment and the internet access I have here (up in the mountains) isn't a good connection - keeps going off. I am returning to England in July though so have made a note of your post and will do more research on the Leslie name when I get home.
Nothing more has come to light so this info is another push for me. Thanks again