This doesn't look like Birmingham. There was only one Hyam's & Co store in Birmingham in the late 19th / early 20th century and that was in New Street opposite King Edwards School. This is not a photo of that store. Perhaps it is a photo of one of the others Hyam's stores, outside of Birmingham.
Hyam's did have a branch in 40-41 Dudley Street, Wolverhampton.
(Sources:
1.
lookandlearn.com website entry for Messrs Hyam & Co. 'Illustration for 'Progress and Commerce',1893.
2. British Newspaper Archive, Leeds Mercury, Sat 28 Feb 1925 which refers to the closure and sale of the Wolverhampton & Birmingham Hyam's stores).