Nimrod Trooper role
The Nimrod had a Trooper role in its original plans, some bits were still with the MR2. The 2nd lox pot I'm sure had conections labeled 'trooper lox'. The fixed and rotary sonobuoy launchers could be removed and blanked for more seats the extra O2 pax masks on the cabin roof marked where the seats were to be fitted. I'm pretty sure the Galley could be removed as well. Not sure the last mod would be entirely popular!