This September I'm taking on 30 days of mystery challenges for Bloodwise.

From the silly to the sublime, the risky to the ridiculous, every day I'll find out exactly what my challenge is.

I really hope I don't end up regretting this!

Apart from the Thames Bridges Trek on September 7th, I have absolutely no idea what's in store. I've been told to expect the unexpected, and that there may be a few special challenges with my old pals from Blue Peter, but I'll just have to wait and see

I'm not going to lie, I'm nervous and excited as to how its going to turn out, so any words of support you can give me on Instagram and Twitter will be very much appreciated.

But more importantly, any donation you can make, big or small, will make an incredible difference for people with blood cancer.

In 2017, my lovely wife Gemma was rushed to hospital. She'd been back and forth to the GP for about six days but told to go home and rest every time. And four days later, she died of acute myeloid leukaemia (AML), an aggressive form of blood cancer.

Our family was torn apart. I lost my wife. Ethan lost his mum.

We'll never get Gemma back. But in the months after her death, I formed the Gemma Thomas Fund with Bloodwise. It will invest money into research on blood cancers such as AML to prevent other families suffering such devastating loss.

If me taking on a few challenges can raise awareness and help make sure other families don't have to go through the same thing we did, then it will be worth a little temporary embarrassment.

So please, give generously, and help get us closer to the day we've finally beaten blood cancer.

Simon