stair

The inquest also heard two statements from firefighters Leighton Brown and Gareth Davies who said the stairs banister, ceiling and the whole of the landing was “covered in smoke and fire” on their arrival.

It can walk up and down stairs and navigate tight spaces.

The prosecution say he then armed himself with two knives, one large kitchen knife, and another flick knife, and went up two flights of stairs to Mr Bush’s bedroom, where an attack began.

“I often hear: ‘I can carry groceries up the stairs now,’ ‘I can cut the grass,’ he says.

"I was never really worried about the seizure itself, it was more the falls. I was really afraid of being anywhere near stairs," she said.