I’ve linked to his diary on the BBC News site a couple of times over the past couple of years, today he signs off for the last time.

I have written it ahead of time because I knew there would be a point when I was not well enough to continue.

That time has now come.

What I wanted to do with this column was try to prove that it was possible to survive and beat cancer and not to be crushed by it.

Even though I have to take my leave now, I feel like I managed it.

I have not been defeated.