The widow of PC Keith Palmer is still "in the dark" about security at the Palace of Westminster just over two months before an inquest into her husband's death.

On March 22 last year, Khalid Masood, 52, was shot dead by police after he drove a rental car into pedestrians on Westminster Bridge before fatally stabbing PC Palmer, 48, in the Palace of Westminster's forecourt.

American tourist Kurt Cochran, 54, retired window cleaner Leslie Rhodes, 75, Aysha Frade, 44, and Romanian tourist Andreea Cristea, 31, also died as a result of Masood's rampage.

READ: Tributes to Bromley officer PC Keith Palmer after Westminster attack

On September 10, Chief Coroner Mark Lucraft QC will begin a full inquest into the victims' deaths followed by a separate inquest for Masood in Court One of the Old Bailey.

A key issue will be the effectiveness of security at the Palace of Westminster before and after the attack.

Police and Parliamentary staff responsible for the Palace security have yet to provide statements, and were set the deadline of July 16.

At a pre-inquest hearing, a lawyer for PC Palmer's widow Michelle Palmer complained of delays in receiving the reports.

Matt Waszak said: "On behalf of Mrs Palmer, we are disappointed we have not seen the reports. Mrs Palmer remains in the dark about this information."

He pointed out the Metropolitan Police Commissioner Cressida Dick had spoken publicly about it in an interview with the Guardian newspaper as long ago as April 2017.

He added: "To find ourselves at this hearing, 10 weeks before the start date, without the reports is not impressive."

READ: Family, colleagues and Charlton fans mourn Bromley officer PC Keith Palmer

The court heard some of the witnesses to the inquest had asked to give their evidence anonymously, including a senior MI5 officer.

The officer referred to as Witness L is expected to reveal what the security services knew of the attacker, without damaging "national security".

Witness L will give his evidence from behind a screen and would only answer questions provided in advance, the court was told.

Jonathan Hough QC, counsel for the coroner, said families of the victims had been asked to provide "pen portraits" of their loved ones to be read at the inquest as a show of respect.

The inquest into the victims' deaths is expected to take three weeks and will be heard by Mr Lucraft.

A jury inquest will then be held at the Old Bailey into the death of Dartford-born Masood and will go on for a week.