I never met my Uncle Donald. From photos, it's clear he was a cheeky young chap. That grin, dressed all proper in his little pinstripe jacket. A twinkle in his eye. Born in the East End of London, I can only imagine the mischief he'd have got involved in.

Sadly, Donald never had the chance to be mischievous. He was diagnosed with epilepsy as a child, and passed away in 1963 aged 29. Mum speaks about visiting her brother most of his life in a hospital that sounds like an insane asylum, where treatments were cruel and largely ineffective. Thankfully things have moved on a lot since then.

It would have been Donald's 90th birthday this year. With my best friend Matt, I'm cycling 300 miles to Paris from London this July in Donald's memory. And because Matt's daughter Gwen now lives with epilepsy. As I say, the way we treat the condition has moved on - largely thanks to charities like Epilepsy Action - but there's a long way to go.

Epilepsy is a common health condition, one you've probably heard of but know little about. It's not just an inconvenience, flashing lights and falling over. As Matt and his family have learned, it can be unpredictable and terrifying. And as I know from my uncle's short life, potentially fatal too.

Epilepsy Action is creating a world without limits for everyone affected by epilepsy, connecting people with others, and providing support and trustworthy information. They call out the misunderstanding, prejudice and barriers that stop people with epilepsy living their best life.

Please show your generosity and sponsor me to help Gwen and others like Gwen. And to help celebrate Donald's big birthday. As we cycle south, I promise to be mischievous on his behalf.

Thank you, Rob