Squelching through the claggy pale brown mud while clutching a paper cup full of hot cider I would always be on a mission. My waterproof jacket and trousers were never quite as effective against the Glastonbury Festival rains as the manufacturer promised but it was okay because I was on a mission. Back in the days when I was a regular reveller at Worthy Farm my mission was always to change the world in a big way. I would do this by trekking through the thick mud to sign as many petitions as I could.

Over the years I gave my signature to campaigners fighting for causes including making poverty history, world peace, access to safe drinkable water for everyone in the world, and a fair few others I've forgotten. And one year I went one better than a petition by letting people from Water Aid paint half my face blue.

With the warmth of the cider inside me I naively felt like it would be possible to achieve what the campaigners had set out to do.

Instead we still have poverty, we are much closer to world war than we are to world peace, and safe drinkable water isn't a thing for millions of people across the world.

Maybe it's my age or maybe it's the fact that being diagnosed with incurable cancer has made me a lot more focused on what I can achieve but now I'm a lot more realistic.

My mission is still to change the world in a big way but now I know that the best way for me to do this is with a smaller, simpler goal than the ones campaigners at Glastonbury have.

And if you have ever had cancer, or known someone who has gone through the disease, or just read about someone who has had cancer or cried when it's happened to a character on your favourite soap, or if someone in your street has been diagnosed with it and you didn't know what to say, then I hope you will back my goal too.

Being told you have cancer is the worst thing most people will have to deal with in their lifetime and fighting the disease is a mental battle just as much as it is a physical one.

This is why I'm leading the Daily Express's Cancer Care campaign to ensure that all cancer patients have access to mental health support both during and after treatment.

You can show your support by, you guessed it, signing the petition I've set up on the Parliament website. 

One in two people in the UK will get cancer in their lifetime and, I believe, this means that it will affect everyone in some way so I'm urging you to click the link below and back my mission.

It's the best way to help the Daily Express send a strong message to the Department for Health and also the NHS that they need to take action to improve the mental health of cancer patients.

If we get 100,000 signatures then it could be debated in the House of Commons. Surely if this happens the Government will have to listen and turn my mission into a reality.