If a relatve of mine died on a flight then where their body was stored for duration of flight is to me irrelevant.
What is relevant is whether they had "treated the body with dignity and respect" since their demise, my expectation of CC would that in
99.9% of cases that would be the case.
In relation to moving the body then if FC is available then moving the body into a seat up there would be best case scenario, at least even
in jest family could say that his last flight was in 1st class.
Diverting while already dead is pointless as wouldn't want to try an get a body back from Vladivostock to Uk just because they needed to
drop off the body.
Would also have no issue sitting next to a dead body........................ assumming they had expired due to Heart attack etc and not Ebola
or likely to reanimate like in The Waking Dead.