The parents of a British Muslim convert believed to have travelled to join Islamic State in Syria have appeared in court charged with terrorism-related offences. John Letts, 55, and Sally Lane, 54, of Chilswell Road, Oxford, appeared at Westminster magistrates court and spoke only to confirm their names and address. They are both charged with three counts of arranging the availability of property or money to another person knowing or having reasonable cause to suspect it could be used for the purpose of terrorism. It is alleged the pair transferred £223 on 2 September last year, £1,000 on 31 December and £500 on 4 January 2016. Lane is charged with two further counts of attempting to provide money or property knowing or having reasonable cause to suspect it could be used for the purpose of terrorism. Their son, Jack Letts, dubbed "Jihadi Jack", was suspected of being the first white Briton to join the terrorist group after he left his Oxford home and travelled to Syria last year. The 20-year-old reportedly goes by the name Abu Mohammed and married an Iraqi woman with whom he has a son, Muhammed. Lane and Letts deny the charges and will appear at the Old Bailey on 23 June.