EEA dependant INK STAMP on diplomatic pp?

[Hana17]

Hi guys! Does anyone have information wether or not Border Agents would stamp a diplomatic passport at UK border with an EEA dependant ink stamp?

(We were earlier refused an EEA FP, and still waiting for a decision for the second application, however HO is delaying it, we r entering the 4th week, and no word from them. I hav a job offer, with a 20sept starting date, and they r sitting on our original passports)

So we r thinking to go through Calais by Eurostar. I can travel with my ID, and my non-eea husband has a diplomatic passport. We r not sure if theyll accept it and stamp it or make a problem out of it? Any ideas?