Probably (No other B. M. Welford could be found.):

The birth of Bertha Minnie Welford was registered in Aylesbury, Buckinghamshire, England during the first quarter of 1879. Her parents were Charles and Martha Welford. Her marriage to John Hugh Jones was registered in Walsall, Staffordshire, England during the third quarter of 1903.

Wills and Administrations, 1964
Jones, Bertha Minnie, of 40, Roycroft Place, Walsall, Staffordshire, widow, died 19 November 1964 at Manor Hospital, Walsall. Administration Birmingham 21 December to Eleanor Johnson, married woman.    £257.