He explained: “I have had a very up and down lockdown, to be honest.
"It started well, then I had a bit of a dip, then I had what I can only define as a manic phase probably for a few weeks I was a little bit out of control, then I had a massive plunge."
He added: "As you say, an awful lot of people have been affected by the pandemic.”
Alastair Campbell health: Journalist has opened up about his depression battle (Image: Getty Images)
Alastair has written a book about his depression journey called Living Better: How I Learnt to Survive Depression.