Why I sleep in a fortress in the woods

The Surrey Hills in south-east England have been designated an Area of Outstanding Natural Beauty.

They might also be home to the fifth largest onshore oil deposit in the whole of the UK.

An energy company has won a long-running legal battle to undertake exploratory work there.

But local residents and environmental activists have forged an unlikely alliance to try to stop them.

Claire Marshall has been staying in their protest camp and getting to know them.

BBC News