King Charles said the British royal family supports a full investigation after his younger brother was detained on suspicion of misconduct in public office.

Andrew Mountbatten-Windsor, who is still under investigation, was seen leaving police custody on Thursday evening after being detained on suspicions of misconduct in public office.

King Charles III said the "law must take its course" in response to Andrew's arrest and that the police had his "full and wholehearted support and co-operation".