In December we are starting this 10 day challenge to travel across Costa Rica from the Caribbean Sea to the Pacific Ocean. We have to cover 300km cycling, trekking, rafting and kayaking. We need to get fit... All of this because we were introduced to Lewis via a friend and wanted to help support his foundation, raising money for children with brain tumours and their families.

To be clear, we have already paid all the costs of the trip and so we are not asking you to fund our 'holiday' - every single penny raised here will go directly towards supporting this cause.

We are aiming to raise £3,000 each, hence the combined £6,000 target so please help if you can.

Brain Tumours are the biggest cancer killer of children, with one child dying every three days...