“I didn’t want to reach 60 and be a party woman. I used to drink mainly in restaurants – I’d eat out five times a week.

“I don’t know if I feel better, because I felt good when I was drinking, but I like the clarity. I grew up a child of the 60s trying every kind of drug I could get my hands on. Now, it’s a different kind of high – being focused.”

The model was coy about plastic surgery.

She said: “It’s a personal choice. I’m not going to say I haven’t done anything.

“I’m not going to say I have. I’m very honest but I find that when you start talking about things like that it defines you, it becomes everything that’s written.

“It would be nice to see a fashion range that is geared towards a vibrant, sexual, confident 50-something.

“When I was a young model there was nothing for my age group. Now it’s completely geared towards that very young market.”