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.