But a spokesman for Luminar told the BBC: "The club management had a door-counting procedure in place on the night and the police investigation will demonstrate that."

He said the late-night industry was "heavily regulated" in the UK and Luminar had its own health and safety team which carried out checks in addition to those of the local authority.

On Wednesday the Independent Police Complaints Commission announced it had begun an investigation into Northamptonshire police's actions before and during the night of 18-19 October.

In 2003 a stampede on an exit stairwell at the E2 nightclub in Chicago led to 21 deaths. That incident had been sparked by bouncers letting off pepper spray during a fight on the dancefloor.
The Cocoanut Grove fire The 1942 Cocoanut Grove fire in Boston is the worst ever nightclub incident

It later emerged the club's owners had ignored a court order to close one floor of the club and they were jailed.

As the police investigation into the Lava Ignite incident continues relatives of the two dead women, both university students, are left to grieve.

This week the head teacher of Miss Jackson's old school in Harlesden, Geraldine Freear, paid tribute to her: "She always had time to listen and mentor younger pupils. She was a bright, young student with so much to offer in her life."

The Jackson and Nanfuka families will hope the police inquiry will give them answers to explain how and why their loved ones died.

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