British woman Natalie Jade Seymour, 22, and her Canadian friend Abbey Gail Amisola, 27, were found unconscious by staff in the Monkey Republic Guest House in the tourist hotspot of Kampot.

They were taken to hospital but couldn’t be revived.

As police investigate the cause of the women’s deaths, Ms Seymour’s mother, Wendy Bowler, said the last time she spoke to her daughter via WhatsApp, Ms Seymour complained of being unwell from food poisoning.

“My daughter had already told me she wasn’t well and said she might go and get something to make her feel better,” Ms Bowler said, according to the UK’s Mirror.

“The hotel manager was going up and down with drinks and told them they should go to a medical centre.

“They decided to sleep it off but never woke up again.

“At the minute, bodies are in the morgue and they’ll be sent over but it could take up to three days. I don’t know if they’ll want an autopsy to determine cause of death, because nobody knows.”

Local reports say police are investigating whether over-the-counter medications taken by the women played a part in their deaths.

Ms Seymour, from Bedfordshire, and Ms Amisola, from Winnipeg, had become friends after they met in Bali while travelling.

Ms Seymour’s last post to social media three days before her death showed her visiting the Cambodian island of Koh Thonsay.

“It seems they were very close friends who were travelling together,” a representative for the Monkey Republic hostel told the Daily Mail.

“They arrived together and went around together.

“This is now in the hands of the police but there is nothing suspicious about their deaths.

“One of the staff saw them last night and asked if they were going to eat in the restaurant, but they said they weren’t going to be eating.

“They did have a lot of water in their room. Everyone is very upset about it.”