An Oxford law graduate who works at Sotheby's is sleeping in a ditch for a year to raise money for the Woodland Trust.
Hugh Sawyer, 32, commutes to work every day from his camp in woods near Lewknor, Oxfordshire.
"I am trying to prove it is possible to maintain a full existence while cutting back," said Sawyer. "I have realised I can lead my life without television, carpets, sofa, electricity, chairs, tables and a fridge-freezer."
Sawyer wears a Gieves & Hawkes suit at work. His morning wash is a few wet wipes or a shower at work or in the gym.
He was forced to move ditch after an attempted mugging, and he fell ill after boiling water from the Thames in an attempt to make it drinkable.