Scene examination officer Robert Bishop (46) said the 360-degree panoramic system was used to create views of the block of flats at 79-85 Bloomfield Road.

Jurors were able to see outside the front door and were taken through the house by Solicitor General Frank Mulholland QC, looking in the hallway, kitchen, bathroom, livingroom and bedroom in turn.

He drew the court’s attention to a collection of small stones underneath the fuse box cover just inside the entrance.

The witness agreed these were the sort of stones that might be used in a fish tank.

In the kitchen, on a work surface, the camera zoomed in to where a lighter lay beside a bottle of mayonnaise.

The Solicitor General also asked for close-ups of a plastic container in the bedroom to be shown together with, “the remains of a burnt-out mattress”.

Stills photographer Neil Smith (31) said he had been asked to take images of a green canister beside the front entrance to the close leading to 83 Bloomfield Road.

He agreed it was of the type that would be used to contain flammable liquids and there were blackened areas on the canister.

The Solicitor General then asked about a blue tarpaulin that could be seen in some of the pictures looking towards the front of the block.

The witness said the tarpaulin covered the remains of two dogs that had been in the flat.

He was then asked about photographs taken inside the kitchen that showed the lighter seen earlier in the tour. The witness said his photographs also showed another lighter further along the work surface.

A close-up of the livingroom window showed a smashed pane of glass.

In a hall cupboard there was a partially dismantled motorbike.

Beside it lay a plastic container in a bucket and Mr Smith said the container appeared to be a fuel tank.

Jutting out from behind boxes in the cupboard he told the court the butt of an air rifle could be seen.

Returning to the livingroom, he said a black plastic tube beneath a radiator appeared to be a nozzle, of the type attached to a canister containing flammable liquid.

Yesterday, Blackburn’s plea of guilty to killing his 17-year-old girlfriend was rejected by the Crown and he now stands trial on a charge of murdering her by pouring petrol over her and setting her alight.

Blackburn (18) denies that, on April 25, at Fraser Place and Newton Avenue in Arbroath, he assaulted Jessica McCagh, now deceased, by seizing her, pulling her, slapping and punching her on the head, knocking her down and pushing her.

He further denies that on April 25, in Newton Avenue, he conducted himself in a disorderly manner, pointed an air rifle at two men, repeatedly pulled the trigger, placing them in a state of fear and alarm and committed a breach of the peace.

He also denies that on April 25, at an address in Bloomfield Road, Arbroath, he was in possession of cannabis resin.

He denies that on April 25 at the same address in Bloomfield Road, he assaulted Jessica by throwing petrol over her, throwing petrol over a bed in the house and setting fire to her whereby she was so severely injured that she died later that day in Ninewells Hospital in Dundee and he murdered her, having previously evinced malice and ill will towards her.

At the outset of the trial, defence counsel Neil Murray QC told the court Blackburn would plead guilty to the lesser charge of culpable homicide by throwing petrol within the house in Bloomfield Road, which ignited and that he killed her.

He said Blackburn also offered to plead guilty to assaulting Jessica in Fraser Place and Newton Avenue, under deletion of the allegation that he knocked her down, and guilty to the remaining two charges.

All these pleas were rejected by Solicitor General Frank Mulholland QC, who is conducting the Crown case.

The trial continues.