"The Fireflies" (an amateur cycling group) tackle the toughest peaks in Europe every year to raise money for leukaemia charity Bloodwise, cycling from London to the South of France. The journey is no freewheeling saunter – it’s a tough physical, emotional and psychological challenge that sees a gang of amateur cyclists take on the vertiginous roads through the Alps.

Nick Mason has directed a gruelling short film documenting the sheer grit and effort that it takes to master the treacherous Alpine route. Unconditional Love also offers viewers a glimpse into the work that Bloodwise does with the money raised by the FireFlies and their supporters.