Laura Plummer was locked up for carrying banned painkillers she said were for her partner, Omar (they are pictured together)

The family of jailed Briton Laura Plummer have revealed their anger at being given 'false hope' after her pardon withdrawn by the Egyptian president.

The 33-year-old was jailed for three years on Boxing Day after being caught bringing illegal painkillers into the country.

She was recently told she would be freed from her cell after her name appeared on a presidential pardon list due to be signed off by Abdul Fattah el-Sisi.

But the British Embassy in Cairo has allegedly told her family that there had been a ‘mistake’.

She now faces a further six months before an appeal can be heard, with her sister Rachel claiming the family would 'not give up'.

'Just wanted to say thank you everyone for your continuous support,' she said in a Facebook post.

'I had no info to update and only found out today my sister was not getting pardoned. We will now look to getting the appeal in process.

'We will get knocked down over and over but we will keep getting up and do everything we can until we bring her home.'

Her mother Roberta, 63, added: ‘How can they do this to her? It’s so cruel. We’ve been double-crossed.’

The shop worker has been in jail since October when she was arrested.

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Miss Plummer's family (pictured, including mother Roberta on the left) had visited her in her 'hell hole' prison and are devastated her pardon has been withdrawn

The shop worker (pictured) has been in jail since October when she was arrested

Ms Plummer's family, who have described Laura (right) as 'naive', said she was taking the tablets for her Egyptian partner Omar (left), who suffers from severe back pain

Miss Plummer, who was said to be ‘doing well’ despite an agonising wait for her release, has not yet been of her retracted pardon, according to The Sun.

Yesterday police in Britain said a probe into how she got the drugs, available only on prescription in the UK but banned in Egypt, is continuing.

An East Yorkshire Police spokesman said: ‘We are trying to determine if a criminal act may have taken place.

‘We are still looking into the circumstances of how the prescription drugs came to be in her possession and if any further individual has committed any offences. This investigation is still ongoing.’

Miss Plummer told Egyptian police she had been given them by shop worker colleague Donna Irvin, 53, who has refused to comment.

The pills were for Miss Plummer’s Egyptian boyfriend, Omar Saad, because he is said to suffer from a bad back following a car crash.

The Foreign Office said: ‘Our embassy remains in regular contact with the Egyptian authorities.’

Ms Plummer previously told The Sun that her experience was like that of Bridget Jones in The Edge of Reason, during which Bridget ends up in a Thai prison after cocaine was found in her luggage.

She has spent three months in at least three cells across the country after landing at the Red Sea resort of Hurghada, about 450km south east of Cairo, with 290 Tramadol pills in her luggage.

The potent painkiller is illegal in Egypt and she was sentenced to three years in jail on Boxing Day, triggering a desperate legal battle from her family.

Timeline: How did Laura Plummer end up in an Egyptian jail? Ms Sinclair said the family have had no contact with Laura but have had an update from Omar which gave them small comfort. Pictured: Laura (right) with her two sisters October 9, 2017: Laura Plummer is arrested at Egyptian airport after she is found in possession of 290 banned painkillers October 10: She sends desperate text to her father saying 'Dad, please answer your phone, I am in trouble' November 4: Her family visit her from the UK for the first time in an Egyptian holding cell November 21: Foreign Secretary Boris Johnson attempts to intervene in the case but Ms Plummer's lawyer says it is pointless December 26: Ms Plummer is jailed for three years following a trial in an Egyptian courthouse January 9, 2018: She is moved to a crowded Cairo prison, where conditions are said to be 'horrendous' January 10: Humberside Police back in England reveal a review into how Ms Plummer obtained the painkillers January 26: Foreign Office sources reveal plans to give Ms Plummer a presidential pardon January 29: The pardon is inexplicably withdrawn, with the Foreign Office claiming 'a mistake' was made September 25: Laura is left 'devastated' after losing an appeal against her three-year sentence January 28, 2019: Miss Plummer is granted an early release and is moved from jail to a police station January 29: The 34-year-old flies home saying the 14-month ordeal has 'been like living a nightmare' Advertisement

Ms Plummer was taken to a Hurghada police cell before being taken to the notorious Qena prison after being sentenced, but it was decided there was no room for her and she spent a week back in Hurghada before being sent to a prison in Cairo where conditions were reportedly better.

Two years ago Ms Plummer and Mr Saad had an Orfi marriage, which is not registered with the state but allows them to share a hotel room.

Despite already having a wife he has always said he also considers Ms Plummer his wife. Polygamy is legal for men in Egypt.

The pair met at the luxury Hilto Sharks Bay resort around four years ago in Sharm el Sheikh, when Ms Plummer was on holiday and where Mr Saad was a lifeguard. Since then she would visit Mr Saad three or four times a year.

Ms Plummer has always maintained she did not know Tramadol was banned in the country and obtained the drugs from a work colleague at the retail shop where she worked.

Pete, from Essex, said Laura (centre alongside her sisters) will be forced to sleep on the floor on a crowded cell - or rent a bed from a 'lifer' for up to 400 illegal smuggled cigarettes a month

Sister Jayne, brother Kirk and mother Roberta arrive in Egypt amid hope that Ms Plummer was to be released from prison

She will have to bribe inmates to get a bed and will only be allowed out of her cell twice a week, according to a former inmate of her infamous prison.

Pete Farmer, 45, was locked up in the cockroach-infested Al Qanater prison for two years before his release in November.

Ms Plummer was moved to the Cairo prison to begin her three-year jail term on January 9 after she was arrested for carrying 290 banned painkillers.

Pete, from Essex, said she will be forced to sleep on the floor in a crowded cell - or rent a bed from a 'lifer' for up to 400 illegal smuggled cigarettes a month.

He said she'll only be allowed out of her cell for an hour or two every three days, and will have to wear a long white dress with an Islamic head covering.

She'll have to buy the protection of the guards or other prisoners to ensure her safety, and won't be allowed any visitors for the first 15 days, he claims.

Al-Qanatir prison, on the outskirts of Cairo in Egypt, where Miss Plummer has been held

Tourist Laura Plummer, 33, from Hull, was moved to the Cairo prison to begin her three-year jail term on Saturday after she was arrested carrying 290 banned painkillers. A fellow Briton who spent time in Al Qanater said Laura will be forced to sleep on the floor and bribe other inmates for a bed. Left and right: Pictures from inside the shabby jail

Speaking from Essex, where he is staying with family, Pete said: 'The worst bit of her entire time, she might well have just endured during the transfer there.

'It will have been eight to ten hours in the back of a baking hot lorry with no stops.

'There will have been 30 others stuffed in, with all the heat and all the sweat and urine, trapped in this metal box.

'If someone throws up it just runs all over the floor for the rest of the journey.

He said the British Embassy visit once every three months and her cell will be subject to regular unannounced searches.

'They just destroy the place and then throw everything into a pile,' he said.

He claims no letters or post are permitted to be delivered in or out of the prison, but inmates can deliver post internally, via the prison pastor.