From a letter to the Herald:
"Tony Blair is a man of blood with the deaths of hundreds of thousands to his account. He has shown sign of neither remorse nor repentance for his crimes. Indeed, he fantasises that he is an acceptably neutral peacemaker in the Middle East between those whose societies have been destroyed by violence and those who have so destroyed them. He is so delusional that he has no conception of his errors. Still, any decision as to whether he should receive Holy Communion in the Roman Catholic Church must (in the first instance) be a matter for the bishop in whose diocese he chooses to present himself.
However, it might not be amiss to point out that a similar situation occurred in 390 AD when, after the massacre at Thessaloniki, the emperor Theodosius sought to receive Holy Communion and the scandalised Bishop Ambrose sent him away with a flea in his ear and the instruction to imitate David in his repentance as he had imitated him in his guilt. When Theodosius eventually returned after seven months' penitence, he was on his knees. But then, Theodosius was capable of remorse."
More correspondence on this theme here.