The Duke of Sussex arrived at a London court on Tuesday to challenge the British government’s decision to downgrade his level of taxpayer-funded security while he is visiting the United Kingdom.

Harry arrived at London’s Court of Appeal on Tuesday for the start of a two-day hearing in his case over his police protection in Britain.

Prince Harry is back in London for a two-day court hearing as he appeals a High Court ruling regarding his security arrangements in the U.K. — a long-running legal battle that has contributed to ongoing tensions with his father,