peter barnett , 43 , is said to have caused a loss of £ 23,000 to chiltern railways over two-and-a-half years that barnett admits six counts of fraud by false representation between april 2012 and november last year .
the australian-born lawyer argues that he only dodged up to £ 9,714.40 in fares , claiming the amount should be based on the cost of a weekly ticket .