Looking through my notes I came across an entry I made but never commented on.

This entry is to be found in White's Trade Directory, Sheffield, 1911:

Mrs Ellen Ashforth, Shopkeeper, 41 Burton Street

At the time of her son William Henry ASHFORTH 1873-1926's marriage to Florence FLOWERS 1876-1973 in December 1895, Ellen ASHFORTH (née Ellen TOMLINSON 1855-1943) is residing at 172 Cuthbert Bank Road, Hillsborough, Sheffield, Yorkshire. Cuthbert Bank Road cuts across Bamforth Street and Burton Street.

I cannot confirm this is my gg grandmother Ellen ASHFORTH (née Ellen TOMLINSON 1855-1943) but it could well be.

Updates:
2009-01-25 I had completely overlooked the fact that the Renwicks / Ashforths were known to be living at 41 Burton Street.

2010-09-21 The death certificate for Ellen ASHFORTH (née Ellen TOMLINSON 1855-1943) records her death as 10th July 1943 at 41 Burton Street, Sheffield. I think it is safe to assume that the entry to be found in White's Trade Directory, Sheffield, 1911 for Mrs Ellen ASHFORTH (née Ellen TOMLINSON 1855-1943) is that of my gg grandmother.