So when one knows that an aircraft is 'probably' flying with near minimum fuel (hopefully you are aware of this latest craze) and diverts to an airfield on RVR's and doesn't land for whatever reason but then diverts again - it is quite likely that he will be cutting into his final reserve - that's what it's for.
I believe you said "Keep to the facts". How do you know that they were 'probably' flying with near minimum fuel? Do you know the fuel policy of the company in question? Or even how much fuel they had at EMA?