Don't tell Stewie Griffin
Wow, London is awesome:
_Where in London can one purchase plutonium? In Covent Garden, at the Helios Homeopathy shop.
[…]“I went to Covent Garden and went into the shop and said, ‘Please, may I have some plutonium.’ And the lady behind the counter said, ‘I shall fetch the chemist.’_
They even tell you what ailments can be treated by taking plutonium medicine. Strangely, “lack of death” is not on the list.