John Sulston is one of the smartest men I know – well, he ought to be, as a Nobel prize winner – and last week I got him talking about religion in front of an audience for the Westminster faith interviews.

One of the things that came up in this, as so often before, was the definition of "religion". Sulston was brought up as a low church Anglican, and still feels that religion must involve God and a belief in the supernatural, and that ritual is secondary to theology.