Queen Elizabeth II hopes those who witnessed the Manchester terror attack last month are not affected later in life.

Queen Elizabeth II

Queen Elizabeth II

The 91-year-old royal hopes those who attended Ariana Grande's concert in May, which saw 22 people dead and even more injured, will not suffer any repercussions from the horrific ordeal, and will not be plagued with Post Traumatic Stress Disorder (PTSD) "at any time" in the future.

Speaking at a party at Buckingham Palace prior to the 64th anniversary of her coronation, which has been reported on the Express Online, the monarch said: "PTSD can come back at any time."

And the Queen hopes the charity work her grandchildren Prince William, 34, and Prince Harry, 32, have been working on with their Heads Together campaign to combat mental health illnesses will help anyone who holds painful memories about the incident.

Transport for London's chief engineer, Brendan Sleight, recalled his conversation with the Queen, he said: "We talked about PTSD and whether some of the young children in Manchester would be affected by that.

"She mentioned hopefully they won't be affected, they may have been unconscious.

"We talked about how now it's a recognised condition, especially with the work of her grandchild, she hopes it will be more open and they'll get help for any PTSD straight away."

The Queen released a formal statement at the time of the ordeal where she expressed her "deepest sympathy" to those who were involved.

The statement read: "The whole nation has been shocked by the death and injury in Manchester last night of so many people, adults and children, who had just been enjoying a concert.

"I know I speak for everyone in expressing my deepest sympathy to all who have been affected by this dreadful event and especially to the families and friends of those who have died or were injured.

"I want to thank all the members of the emergency services, who have responded with such professionalism and care. And I would like to express my admiration for the way the people of Manchester have responded, with humanity and compassion, to this act of barbarity."