Getting back right on thread, I have found the following account in "Allen's Pictorial Guide of Birmingham", dated 1849.
"In 1807 an act of parliament was obtained, by virtue of which the surrounding buildings, by which the church was much obscured, were taken down, and the space thus obtained added to the churchyard, which is now surrounded by a substantial wall, surmounted with iron palisades. An additional burial ground was also provided, consisting of two acres and a half of land, at the upper extremity of Park Street. The improvements round the church, and the acquisition and formation of the burial ground, entailed upon the inhabitants an expense of between £7000 and £8000, for which an annual levy is made upon them."
No doubt St Bartholomew's churchyard would have been well filled by the 1820s or 1830s, when the Key Hill cemeteries were opened, and of course, Witton was the solved the problem of grave space for over a century.
Peter