Episode 24 and this episode is all about 'ultra marathons' - like marathons with a bit more distance and bit more suffering thrown in. Who is suffering and why? Radio producer Mary Colwell, who is walking 500 miles to fundraise for Curlews, and - myself: yes, in an outrageous piece of self-publicity I'm discussing with Jamie Gilardi, Director of the World Parrot Trust, my 24 hour 200+ mile cycle ride from Wiltshire to Cornwall to fundraise for wild parrots.'.