First of all thank you all for your excellent replies.
This is what I think.
This is my Margretta,who was born in Magherafelt,Co Londonderry on the 24 Nov 1884. I have her in Magherafelt where she had a son on the 12 May 1906'unmarried mother,no father on birth cert.
Not in 1911 census for Ireland,so I think that is her working as barmaid in Manchester,no sign of son William? And must have married Mr Browne previous to this date.
Your thoughts on this would be welcomed
Curley