Hi Alfie
I have found the following information in an on line newspaper archive.
The accident occurred on June 1st at the Bass Brewery, killing two men, one by the name of Cliff and the other Bucknall, with several others severely wounded, according to the Birmingham Daily Post of Friday June 2nd 1865.
If you would like a copy send me an email address via PM.
Best wishes
Nell
Added - there is also a very full account of the inquest which concluded with a verdict of accidental death.