Do I miss football in Scotland? It keeps you really alive, that's for sure. Your heartbeat fluctuates. I'm flatlining at the moment which is actually quite nice but you need to go up and down to stay alive.

It took me 35 years of being involved at a decent level of football to become manager at a great club like Celtic.

I think what I've actually achieved as a manager does sometimes get a bit overlooked, because all people think about is the media side of things. They tend to forget I've not done so bad.

Everybody at Barcelona loves Messi. They can't speak highly of him.

I've had to take a lot of stick down the years but the one thing that really got to me was when someone questioned my integrity. It's the one thing that really grates with you.

He [Sir Alex Ferguson] used to play tapes of Bill Shankly talking. I remember that and a singer he liked. I don't know who it was but it was crap. He played it on the team bus too, and all the boys hated it. Until one night it got chucked away. If he's still wondering who threw that tape off the bus, it was me. So maybe he was right and I'm not to be trusted.

I tried to talk to the ref but it is easier to get to see the Pope. If I'm in London again and I get mugged I hope the same number of people turn up to protect me. There were six police, four stewards and even a UN peace observer out there.