Dominic Casciani
Legal correspondent reporting from court

Prince Harry goes through an incident from shortly before his mother's death in 1997, where she had been supporting troubled TV star Michael Barrymore (as we reported on Monday).

He explains in his statement how the Daily Mirror's then editor Piers Morgan later wrote he had "heard rumours" about their meetings.

"The thought of Piers Morgan and his band of journalists earwigging into my mother’s private and sensitive messages ... makes me feel physically sick and even more determined to hold those responsible, including Mr Morgan, accountable for their vile and entirely unjustified behaviour."

Image source, Reuters

Dominic Casciani
Legal correspondent reporting from court

In his witness statement, Prince Harry says journalists would illegally obtain information about former girlfriend Chelsy Davy's flights to the UK to see him.

"I walked into the arrivals hall with a baseball cap on and immediately spotted five separate paparazzi sitting on benches with cameras in bags, their hands inside rucksacks and everyone else looking at me," says the prince.

"I remember that someone was videoing me with one of those tiny little cameras between their legs.

"I recall thinking how on earth did they know I was going to be there, but now it’s obvious.

"Here were five big, burly and dodgy looking men, with their hands in their pockets or in rucksacks and satchels in a busy public place.

"My security and I simply couldn’t know whether they were reaching for a camera or drawing some kind of weapon."

Image source, Reuters

Dominic Casciani
Legal correspondent reporting from court

Let's look at some more details from Prince Harry's witness statement.

In it, the prince says that stories that he believes originated from hacking not only caused security concerns - but damaged his relationships.

"I would say their actions affected every area of my life," he writes.

"It created a huge amount of paranoia in my relationships. I would become immediately suspicious of anyone that was named in a story about me, whether it was [confidantes] Mark Dyer, Tiggy or her brother, Harry, for example.

"I felt that I couldn’t trust anybody, which was an awful feeling for me especially at such a young age."

Sean Coughlan
Royal correspondent reporting from court

“You’ve got me doing a workout,” Prince Harry jokes, as he struggles with the many heavy bundles of legal documents being handed to him in court.

He had been speaking quietly to the court, a little hesitantly at first, sitting in the witness box with a computer screen in front of him.

He seems to be warming up now, throwing in a joke, and pushing back on the Mirror Group Newspaper's barrister.

Jemma Crew
Reporting from court

In court, Prince Harry is asked about a line in his witness statement which reads: “How much more blood will stain their typing fingers before someone can put a stop to this madness.”

Prince Harry says he is talking about journalists “responsible for causing a lot of pain, upset”, whom he has not named, adding the reference was broadly to the press in general.

Asked if he is here to "put a stop to this madness", he replies: “That is my hope."

Dominic Casciani
Legal correspondent reporting from court

In his witness statement, Prince Harry says he distinctly remembers incidents that, he says, in hindsight are the hallmarks of phone hacking by a journalist.

"I remember on multiple occasions hearing a voicemail for the first time that wasn’t new – I would simply put it down to perhaps a technical glitch ... or even just having too many drinks the night before and having forgotten that I’d listened to it.

"Sometimes [the voicemail envelope] symbol would vanish before I had a chance to listen to the voicemail.

"I also distinctly remember people saying to me 'did you not get my voicemail?'. I was like, 'no', and sometimes I would go back into my voicemail to look for it but still couldn’t find it.

"I now understand their significance in terms of phone hacking. I believe that both mine and my associates' voicemail messages were hacked by the defendant."

Dominic Casciani
Legal correspondent reporting from court

In his witness statement, Prince Harry says he got his first phone when he went to Eton - given to him by royal aides - and it became crucial to his daily life.

"As I was very heavily involved with various commitments, I would constantly be leaving and receiving voicemails, as text messaging was much less common back then," he says.

"It was my main means of communicating with my family [including my mother who I was obviously extremely close] ... my girlfriend at the time, my friends, members of the Royal Household and those I was working with.

"My voicemails would include incredibly private and sensitive information about my relationships, my operational security and that of my family [and in later years] my work both in the Army and as a senior member of the Royal Family."

Image source, PA Media

Dominic Casciani
Legal correspondent reporting from court

Prince Harry explains in his written statement how he began to suspect he was a victim of phone hacking.

"The tabloids would routinely publish articles about me that were often wrong but interspersed with snippets of truth, which I now think were most likely gleaned from voicemail interception and/or unlawful information gathering.

"This created an alternative and distorted version of me and my life to the general public."

Dominic Casciani
Legal correspondent reporting from court

Turning away from the courtroom for a moment, I'm still reading through Prince Harry's witness statement.

In it, the prince says the press repeatedly tried to break up his relationships and continue to try to destroy his marriage today.

"Whenever I got into a relationship, they were very keen to report the details but would then, very quickly, seek to try and break it up by putting as much strain on it and creating as much distrust as humanly possible.

"This twisted objective is still pursued to this day even though I’m now married.

"I simply don’t understand (and never have) how the inner, private details of my relationships ... could have anything to do with the well-being of society or the running of the country and therefore be in the public interest."

Image source, Reuters

Tom Symonds
Home affairs correspondent reporting from court

Prince Harry tells the court every palace had copies of the newspapers, adding “unfortunately”.

He could not say which stories he’d seen but remembered friends and colleagues seeing what had been written about him. He said that their behaviour "inevitably changed around me".

He said the editors and journalists were responsible for “causing pain and upset” and “inadvertently death”.

“Every single article has caused me distress,” he told the Mirror Group Newspaper's lawyer Andrew Green KC.

Jemma Crew
Reporting from court

Prince Harry is now asked about his “hostility” to the press by the Mirror Group Newspaper's lawyer Andrew Green KC.

He suggests to the prince that this pre-dated his discovery that the tabloid press were using unlawful methods to gather information about him.

He replies: “I’ve experienced hostility from the press since I was born.”

Asked if it would be right to say he has had a “long-standing hostility” to the press, he replied that this was correct.

Image source, Blackstone Chambers

Andrew Green KC is currently cross-examining Prince Harry.

The award-winning lawyer, representing Mirror Group Newspapers in this case, specialises in commercial law, and was described by one of his former clients as "a beast in court".

"He is an opponent to be feared, with a punchy and aggressive court style," the testimony on The Legal 500 website says, external.

"Uncompromising and relentless. Particularly at home with cross-examination and an ability to put unruly judges back in their boxes."

Another describes him as having "an Eye of Sauron-like focus".

Jemma Crew
Reporting from court

Meanwhile, in court, the lawyer representing Mirror Group Newspapers is questioning Prince Harry.

Andrew Green KC starts by referencing the publisher's apology to him – heard previously in court – for one instance of unlawful activity.

The court previously heard a private investigator was instructed by a Mirror Group Newspaper journalist at The People to unlawfully gather information about Prince Harry's activities at the Chinawhite nightclub on one night in February 2004.

The article is not one of the claims being brought by the prince.

Green tells the prince he will be entitled to a “more extensive apology” if the judge finds the newspaper group were responsible for further acts of unlawful information gathering.

Dominic Casciani
Legal correspondent reporting from court

Prince Harry's witness statement goes on: "As a teenager and in my early twenties, I ended up feeling as though I was playing up to a lot of the headlines and stereotypes that they wanted to pin on me mainly because I thought that, if they are printing this rubbish about me and people were believing it, I may as well ‘do the crime’, so to speak.

"It was a downward spiral, whereby the tabloids would constantly try and coax me, a ‘damaged’ young man, into doing something stupid that would make a good story and sell lots of newspapers.

"Looking back on it now, such behaviour on their part is utterly vile."

Dominic Casciani
Legal correspondent reporting from court

Prince Harry's witness statement goes on: "It is no secret that I have had, and continue to have, a very difficult relationship with the tabloid press in the UK.

"In my experience as a member of the Royal Family, each of us gets cast into a specific role by the tabloid press.

"You start off as a blank canvas while they work out what kind of person you are and what kind of problems and temptations you might have.

"They then start to edge you towards playing the role or roles that suit them best and which sells as many newspapers as possible, especially if you are the 'spare' to the 'heir'.

"You're then either the 'playboy prince', the 'failure', the 'drop out' or, in my case, the 'thicko', the 'cheat', the 'underage drinker', the 'irresponsible drug taker', the list goes on."

Dominic Casciani
Legal correspondent reporting from court

I'm going through Prince Harry's witness statement.

He starts by saying his decision to move to California with his wife Meghan Markle was "in large part... due to the constant intrusion, inciting of hatred and harassment by the tabloid press into every aspect of our private lives, which had a devastating impact on our mental health and wellbeing.

"We were also very concerned for the security and safety of our son."

The BBC has a copy of Prince Harry’s witness statement, which we're going through right now.

The long statement contains key evidence from the prince, which he is relying on in this case against Mirror Group Newspapers.

Stay with us as we will be bringing you analysis of the key points.

Tom Symonds
Reporting from court

Prince Harry was addressed as "your royal highness" in court initially.

He agrees he wants to be called "Prince Harry" after the initial "your royal highness".

Prince Harry is in the witness box ready to give his evidence.

He is sworn in, promising to "almighty God" to tell "the truth, the whole truth".

The prince has a full day of evidence ahead of him.

Prince Harry is now in the courtroom in central London's High Court. We're expecting proceedings to start soon.