I may have found Louisa gunn on the 1901 aged 22 living with grandparents and 2 siblings in cosham, hampshire.
Also there are two unmarried william skinners who could be yours, one on board ship (presumably in portsmouth) born in ireland, and one living as a lodger in alverstoke. I don't know if you know this area, but cosham is just a couple of miles north of portsmouth, alverstoke and fareham are both within 6 miles to the west.
I can't find them as a married couple. Do you know their date of marriage?