As Prince Harry arrived at the central London court to appeal a decision to downgrade his security arrangements while in the UK, a body language expert has analysed his projected body language mood as "cocky". The Duke, 40, arrived at the Royal Courts of Justice in central London on Tuesday morning and waved as he entered but did not speak to reporters gathered outside.

Earlier today, the Duke of Sussex claimed he had been "singled out for different, unjustified and inferior treatment", as he appeared at the High Court in London in the latest round of legal action over his security arrangements in the UK.

Prince Harry is challenging the dismissal of his high court legal action against the Home Office last year, over a decision by the Executive Committee for the Protection of Royalty and Public Figures (Ravec) that he should receive a different degree of taxpayer-funded protection when in the country.

Body language expert, Judi James, exclusively spoke to Express.co.uk and analysed Harry's mannerisms upon arrival to court. She said: "With his brisk, swaggering walk and his jacket unbuttoned it would be reasonable to describe Harry's chosen projected body language mood here as 'cocky'."

Judi added: "His chest is puffed and he throws some brusque, celebrity waves to either press or maybe fans waiting to watch him, creating the suggestion that he sees himself as rather heroic and even popular for his current UK court appearance."

Reflecting on how the Duke of Sussex must be feeling ahead of the high-profile case, she adds he might also feel nervous.

The expert explained: "There is one cue or 'tell' though that suggests he might not be feeling quite as brave as he seems to want to make out and that is the frequent touch on the tie or stomach here that creates an excuse for a self-protective barrier gesture.

"As a ritual it is similar to his father's trait of playing with a cuff or watch strap to enable him to lift one arm up in front of his torso."

The Duke of Sussex's security is currently being provided on a case-by-case basis by Ravec, and he has to give 28 days' notice when planning to be in the UK.

The Home Office, which has legal responsibility for the committee’s decisions, is opposing the appeal, with its lawyers previously telling the high court that decisions were taken on a "case-by-case" basis.

In written submissions, Sir James Eadie KC, for the department, said Harry’s challenge to the Ravec decision was fairly and accurately analysed by the judge as relying upon "an inappropriate, formalist interpretation of the Ravec process" and a "mechanistic, overly literal approach", which was "misconceived".

The court of appeal hearing before Sir Geoffrey Vos, Lord Justice Bean and Lord Justice Edis is due to be heard over two days. A decision is expected at a later date.