An inquest into two deaths during a fireworks explosion at a wedding in Windermere has heard from the last two witnesses on its fourth day.
41-year-old fireworks organiser Andrew Coates and his 46-year-old assistant Polly Connor were both killed in the blaze at a luxury cottage in August 2014.
They had been preparing a display for the wedding of John Simpson, who was also the owner of Larch Cottage in Ecclerigg, and his bride Nicole Rothwell.
Mr Coates and Mr Simpson were both registered as running the company 'Stardust Fireworks'.
Today at Castle Green Hotel in Kendal, the jury heard Mr Coates and Mrs Connor were likely to have been knocked unconscious by an explosion.
Fireworks expert Dr Stuart Myatt, who works at the Health and Safety Laboratory (HSL), said that could be a likely explanation as to why the pair never left the outbuilding.
Dr Myatt also said he found the presence of combustible materials and electrical equipment in the same store room as the fireworks 'surprising'.
'It would seem inappropriate for an area that stores explosives," he said.
While he could not say for sure what happened, Dr Myatt said it seemed likely that a "high velocity projectile" had hit the back of a metal locker that was found near the deceased in the outbuilding, knocking Mr Coates and Mrs Connor unconscious in the blast as the fire began.
"There is uncertainty about how the whole thing started and then there is an uncertainty about how they were rendered unconscious.
"If there was a large explosion and they hadn't been rendered unconscious, then I think they would have got out," he said.
Earlier on at the inquest, the jury also heard from Cumbria Fire and Rescue's Alan Sowerby, who has been involved in investigating the cause of the blaze.
Mr Sowerby stated there had been no evidence to suggest the fire had been started from someone smoking, as they found no lighters or cigarette butts in the debris or surrounding areas.
The inquest is ongoing and the jury is expected to reach a verdict on Friday.