Photographer and beauty blogger Carly Lovett, 24, from Gainsborough, who was recently engaged to Liam Moore, was among 38 killed on June 26, 2015 by Seifeddine Rezgui at the resort town of Port El Kantaoui near Sousse.
He fired his Kalashnikov at bathers on the beach before entering the Rui Imperial Marhaba Hotel from the area around the pool.
He continued shooting and throwing grenades before fleeing through the streets and being shot dead by police. Most of his victims were British.
Relatives of the British victims have taken legal action following the coroner’s findings following an inquest in 2017.
Judge Nicholas Loraine-Smith ruled they were unlawfully killed and ruled against a finding of “negligence” by TUI, along with the owners of the Riu Imperial Marhaba.
The judge said the shooter intended to kill as many tourists as possible and added that he did not find a direct link between the response of armed officers in the area and the deaths.
A joint statement from TUI and law firm Irwin Mitchell said: “The tragic events of June 26, 2015 in Tunisia shocked and devastated us all and changed the lives of those affected forever.
“TUI has always expressed its sincere condolences to the families and friends of those caught up in the terrorist attack that day and continues to express its deepest sympathy.
“The plaintiffs fought tirelessly to understand how the attack happened and to seek to ensure that lessons were learned so that other families were not affected by a similar tragedy.
“TUI has worked with the claimants and their representatives Irwin Mitchell, to reach a settlement without admission of liability or wrongdoing and in recognition of the highly exceptional circumstances of the case, and in the hope that this will contribute to assist applicants.
“TUI understands how difficult it must be to move on after such a horrific incident, but hope this gives those affected the opportunity to start doing so.”