I get the feeling a lot of politicians are there to help themselves financially, first and foremost. I don't really need to do that, and I thought if I could do something for sport in Scotland, that would be really fulfilling.

If you keep asking me questions, I will continue to find excuses.

I think if you've managed Celtic or Rangers you can go on to be Prime Minister of Great Britain, it's that hard.

It's an incredible rise to stardom. At 17 you're more likely to get a call from Michael Jackson than England manager Sven Goran Eriksson.

I'm not saying you have to be married to be a good footballer. I'm just saying it felt strange to come to a club where there are only three members of the first-team squad that are married. You need responsibility in life.

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.