Now these bring back some memories. I’ve fitted, removed, serviced, and tested these, while working on Vulcans at Scampton.

They were fitted just above the right-hand (looking rearwards) back seater, at about head height.

They could fire red, green and red/green twin very cartridges, and also a “window” type decoy cartridge.

I’m sure the Nimrod had one fitted as well, but it’s location escapes me at the moment.