The Telegraph understands that White, from Orpington in the London borough of Bromley, had travelled to Laos with two school friends.
She became ill after drinking shots believed to have been laced with methanol from a bar in Vang Vieng on Nov 12 and later died in hospital.
White’s mother is understood to have flown to South East Asia last week and returned to the UK on Friday following her daughter’s death.
Bethany Clarke, one of White’s friends and a healthcare worker from Orpington, was also treated in hospital after drinking free shots offered by one of the bars in Vang Vieng.
In a Facebook post, she said her “liver started to shut down” and warned other travellers to “avoid all local spirits”.
White was an associate lawyer in the London office of Squire Patton Boggs, an American law firm. It said: “Simone was a talented colleague with a bright future ahead of her and someone who epitomised our firm values.”
On Friday, Australian tourist Holly Bowles, 19, became the sixth holidaymaker to die, just a day after her best friend Bianca Jones died in a Thai hospital.