After all, ninety-nine years old is no big deal nowadays so we can't just blindly write off the death of such a figure as simply being due to "old age" can we? Especially given that he had the best resources and lifestyle of anyone in the world to live longer.
And, there were many motives for any number of people to want Philip knocked off his perch. We could start with his wife for example. The Queen had to endure a whole marriage of infidelity from her second fiddle and there is evidence of spousal violence from her majesty; it is well recorded that she had a penchant for demolishing pieces of fine bone china over Philip's skull.
And what about those frequent bouts of illness and hospitalization of Philip over the past few years. Such a regimen is consistent with someone having been poisoned with cyanide or arsenic whereby toxins build up in the body over time and causing bouts of illness after each dose....only saying.
We also have to look at the fact that it was only 2 months until Philip would have turned 100. Now that is a coincidence that we should not ignore.
So, what about other parties that would have wanted to end the reign of his highness. Philip was known for his undiplomatic slips of the tongue and his undercurrent of racism and bigotry. Some time back, when greeting an Australian Aboriginal in one of the usual after function line-ups, he made the comment, "Where's your spear?" That indigenous guy had every reason to throw a boomerang in the direction of his highness, without the intention of it returning either. Of course, the palace would keep quiet about the fact that the royal surgeons would have spent hours removing v-shaped splinters of gumtree from the fatally wounded prince's brain.
Will we ever get to know the truth?