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It seems people are a bit worried about me, so I wanted to write this letter to my fans to make one thing clear... I’m not down on the floor.

I’d have put this on Twitter but I am rubbish with computers and what I need to say will take more than 140 words.

From a very young age I’ve had to fight . First as a kid to stay out of trouble and then to remain on the straight and narrow.

Then, of course, there were the fights.

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Now I am in a whole different kind of fight – against my bipolar.

But I will win, I’ve no doubt about that.

A lot of people said how worried they were about me after my ITV interview.

It is fair to say I am not always a natural in those interviews. The answers I want to say don’t always come out quite right – I am not a polished politician or a wordsmith like my old mate Chris Eubank.

But the message I wanted to get across is that David Cameron needs to do more to help those suffering mental ill health.

I’ve been proud to support the Sunday Mirror’s Time To Change campaign over the past three years. Respect to the former Care Minister Norman Lamb who came closer than anyone to bringing about real change. We’ve helped thousands of people through creating awareness. But there’s so much more we need to do.

Read more:Big Frank announces return to boxing

So I will repeat this message I sent to David Cameron on Monday: Please meet me and tell me what YOU are going to do to improve Mental Health services. I know you are busy but I hope you can find the time.

I’d love to tell the PM how much we need to help improve the after-care people get when they leave hospital. I’d warn him how, all too often, people are given drugs and told they must stay on them for years.

That might not be right for them. Often, using diet and exercise to treat their condition is far better.

Exercise and keeping fit is crucial in the way I deal with my condition.

Ricky Hatton even invited me down the other week to get on the pads with him. My return to the ring has become a massive talking point and a lot of people say they are concerned for

my safety.

I want to reassure people I’d never, ever want to put myself in a position where I would get hurt – I would not put my family and friends through any of that.

Some people were saying I’ve been badly advised. The fact is I am my own person and it was my idea to talk about the return to boxing.

(Image: PA)

I have good people around me. My agent Dave Davies and my close family and friends, for example, would rather not let me come to harm.

But listen, when I heard some of these young boxers and their promoters saying they could beat me, my pride kicked in and I felt a bit mugged off.

Any champion will tell you it is very hard to turn off those feelings when you leave the ring. I am human and I spoke from the heart. But I know deep down the days of me fighting for world titles are gone.

The authorities have said I would never get a license to fight again so I will continue to train and keep healthy through boxing as it is an important part of staying well.

Last night I was honoured to receive an award at the British Ethnic Diversity Sports Awards.

It’s a privilege to know I have inspired so many people.

Now my focus is helping as many people I can to beat mental health conditions. It is a whole different fight to boxing. It is an opponent you can’t see, but one which I am determined to knock out.