On the south face of Jumpers Bastion there are two WW2 loopholes built into old gun embrasures. These are simple brick and concrete faces, with a loophole. One postion is not clear from the rear having been built over by a new restaurant. The second postion, closer to the main wall, is open and there is only a loopholed wall, and no overhead defence. There is no sign of specialist mounts for MGs.
The actual loophole has now been filled with cement.