HWW - here's a section of wall that has seen a few uses over the years.

Behind this 18th Century building is the precinct of Gloucester Cathedral; in particular Miller's Green, so it is likely that the bricked up archway used to provide access to the mill and other abbey service buildings.

This old structure is relatively 'modern', as there are records of a mill, bakery and brewery here in 1222.

The access door above the more modern garage doors suggests that the building next to the arch was originally a storehous of some sort.