The inquest into the deaths of 30 British holidaymakers in a terror attack at a Tunisian resort is due to conclude today.
A total of 38 people were killed when an Islamist gunman opened fire at a hotel in Sousse in June 2015.
The inquest examined whether the UK government and travel firms failed to protect British tourists.
But the coroner will explain later why he has rejected a request to rule neglect was a contributory factor in their deaths.
Judge Nicholas Loraine-Smith is expected to say that all 30 Britons were unlawfully killed and to explain his reasons for not accepting the neglect submission, the BBC reported.
The inquest has previously heard that “part of the attack or most of it could have been prevented” had security been tighter.
Tui has been accused of failing to vet security at the hotel, but the operator has argued “matters could have been worse” during the attack.
The attack at the five-star Riu Imperial Marhaba hotel was the deadliest on Britons since the July 7, 2005 London bombings.
The gunman, Seifeddine Rezgui, was later shot dead by police.
Andrew Ritchie, who is representing 20 victims’ families, told the inquest which began in January at London’s Royal Courts of Justice that they believed TUI’s “utter complacency” amounted to neglect.
He said the guards at the Riu Imperial Marhaba had not been an effective deterrent and the lack of CCTV had made it a target.
But Howard Stevens, counsel for Tui, said even if there had been additional CCTV cameras or guards it “cannot be said that any of these measures would probably have made a difference”.
The operator maintained it was “wholly erroneous” to claim it had been neglectful and there was insufficient evidence of any gross failure.