I am as squeamish as the next person (or more so), but, for me, Paddy's post sums it up. No matter what you have paid for your ticket, surely the only appropriate response is to (a) do all you can not to increase the suffering of those grieving around you and (b) be damned grateful it isn't you/your mother.
I read the Sunday Times report where the chap was quoted as being saying he was worried about the hygiene implications of being near a dead body for 5 hours. Again, unencumbered by any medical knowledge, surely common sense suggests this isn't much of a risk...
The lack of humanity displayed by Mr. Trinder is really disturbing.