A British grandmother on death row in Indonesia has paid tribute to two Australians executed last night, saying that she has lost hope for herself after seeing the “good men” die.

Lindsay Sandiford, 58, had become friends with Andrew Chan and Myuran Sukumaran, who were shot by a firing squad for drugs offences dating back a decade.

They were among eight people who died, including four Nigerians and men from Brazil and Indonesia, despite international outrage and diplomatic interventions. A mother from the Philippines was granted a last-minute reprieve.

Ms Sandiford said she was “deeply saddened” to learn of their deaths in her cell at Kerobokan Prison in Bali, where the Australians were previously held.

"Many things have been said about whether Andrew and Myuran deserved to die for their crimes,” she added.

"I didn't know those men at the time they committed those crimes 10 years ago. What I can say is that the Andrew and Myuran I knew were men who did good and touched the lives of a great many people, including myself."

Friends said the Australians had attempted to comfort the other condemned convicts during their last day, ordering in KFC on the night before the execution.

Bali Nine pair executed Show all 22 1 /22 Bali Nine pair executed Bali Nine pair executed Bali Nine pair due to be executed People attend a vigil for the prisoners to be executed in Indonesia at Martin Place on April 28 Getty Images Bali Nine pair executed Bali Nine pair due to be executed Crosses for condemned drug convicts (from L-R) Australians Andrew Chan (L) and Myuran Sukumaran (C), and Nigerian Okwudili Oyatanze AFP/Getty Images Bali Nine pair executed Bali Nine pair due to be executed Brintha Sukumaran, a sister of Australian death row prisoner Myuran Sukumaran's screams as she arrives to see him for a final time Getty Images Bali Nine pair executed Bali Nine pair due to be executed Brintha Sukumaran, the sister of Myuran Sukumaran, cries during her final visit to see him in prison on 28 April AP Bali Nine pair executed Bali Nine pair due to be executed Michael Chan, brother of Australian drug convict and death row prisoner Andrew Chan, arrives at Nusakambangan island on 28 April AFP/Getty Images Bali Nine pair executed Bali Nine pair due to be executed The back of a painting by Australian death-row prisoner Myuran Sukumaran is shown, signed by the eight other condemned people EPA Bali Nine pair executed Bali Nine pair due to be executed A lawyer carries a painting by Myuran Sukumaran at Wijayapura port in Cilacap on 28 April Getty Images Bali Nine pair executed Bali Nine pair due to be executed A woman places a tribute on a flower wall that reads '#keephopealive' as part of an Amnesty international vigil for the pair Bali Nine pair executed Bali Nine pair due to be executed People at a vigil in Sydney on 27 April against the execution of Australians Andrew Chan and Myuran Sukumaran Amnesty International/Sitthixay Ditthavong. Bali Nine pair executed Bali Nine pair due to be executed Activists hold a banner during a protest in front of the Indonesian embassy in Manila on April 27, 2015 AFP/Getty Images Bali Nine pair executed Bali Nine pair due to be executed The lawyer for Australian death row inmates Myuran Sukumaran carries a painting after visiting Indonesia's Nusakambangan island on April 26 AFP/Getty Images Bali Nine pair executed Bali Nine pair due to be executed A lawyer carries a self-portrait drawn by Myuran Sukumaran after visiting the prison island of Nusakambangan on 27 April AP Bali Nine pair executed Bali Nine pair due to be executed Workers load coffins into a lorry ahead of the execution of nine prisoners in Indonesia Getty Images Bali Nine pair executed Bali Nine pair due to be executed Indonesian soldiers stand as guard at Wijayapura port near the prison island of Nusa Kambangan on Monday Reuters Bali Nine pair executed Bali Nine pair due to be executed Chintu Sukumaran (L), brother of Myuran Sukumaran, stands next to Michael Chan, brother of Andrew Chan in Indonesia on 26 April, 2015 Reuters Bali Nine pair executed Bali Nine pair due to be executed Raji Sukumaran (R) and Brintha Sukumaran (L) family members of death-row prisoner Myuran Sukumaran cries as they talks to media after visiting Myuran at Kerobokan Prison in Bali, Indonesia EPA/MADE NAGI Bali Nine pair executed Bali Nine pair due to be executed Indonesian police stand guard as the Bali Nine duo Andrew Chan and Myuran Sukumaran arrive at Wijaya Pura Port where they will be transferred to Nusa Kambangan prison ahead of their execution in Cilacap, Central Java, Indonesia Getty Bali Nine pair executed Bali Nine pair due to be executed Halen Chan, the mother of death-row prisoner Andrew Chan, wipes away tears during a press conference in Jakarta, Indonesia EPA/MAST IRHAM Bali Nine pair executed Bali Nine pair due to be executed Andrew Chan, right, and Myuran Sukumaran, centre, talking to their lawyer EPA Bali Nine pair executed Bali Nine pair due to be executed Andrew Chan and Myuran Sukumaran, the two members of the Bali nine who could be executed within days, appear at court in 2006 Jason Childs/Getty Images Bali Nine pair executed Bali Nine pair due to be executed Two Australian drug traffickers Andrew Chan (L) and Myuran Sukumaran (R) were sentenced as the ringleaders of the "Bali Nine" drug ring in 2006 JEWEL SAMAD/AFP/Getty Images Bali Nine pair executed Bali Nine pair due to be executed Myuran Sukumaran is due to be executed EPA

"The good thing is all prisoners were executed together while praying and singing. Before that they hugged each other, saying goodbye," Christina Widiantarti, a lawyer for Brazilian convict Rodrigo Gularte said after witnessing their deaths.

Ms Sandiford, from Cheltenham in Gloucestershire, said Chan was a "close friend and confidante" when they were in Kerobokan prison together.

"He counselled and helped me through exceptionally difficult times after I was sentenced to death in 2013," she added.

"Myu and Andrew used their time in Kerobokan to make life better for everyone around them. They introduced the concept of rehabilitation to a prison that never had it before."

The pair were convicted in 2006 as part of the “Bali Nine” drug smuggling gang who were arrested on the island for trying to smuggle 8kg of heroin to Australia.

During their decade in prison, they organised painting, cookery and computer classes, as well as helping the poorest inmates get food, clothing and essentials.

Sukumaran’s striking oil paintings became well-known, earning an exhibition in London to mark his 34th birthday earlier this year.

One of his last works was a bleeding heart, signed on the back by all eight people sentenced to death on the Nusakambangan “execution island”.

“The men shot dead today were reformed men - good men who transformed the lives of people around them,” Ms Sandiford said. “Their senseless, brutal deaths leave the world a poorer place.”

Families were allowed to see the condemned men for one last time yesterday (Getty Images)

She was sentenced to death for drugs smuggling after being found with cocaine worth an estimated £1.6 million as she arrived in Bali on a flight from Bangkok, Thailand, in May 2012.

Ms Sandiford admitted the offences, but claimed she had been coerced by threats to her son's life, and has since appealed against her sentence without success.

Now she fears she will be in the next round of executions, expected to take place before the end of this year.

After the convicts killed last night were given notice of their executions on Saturday, she said she accepted her fate and “just wants to get it over with”.

“If they kill someone as good as Andrew, what hope is there for me?” Ms Sandiford reportedly told a friend.

“I just want to get it over with. I feel like just giving up.”

All Lindsay Sandiford's appeals have failed and she could be executed this year (Getty Images)

The Australian Prime Minister, Tony Abbott, denounced the executions as “a dark moment in the relationship” between Australia and its large northern neighbour, while Brazilian President Dilma Rousseff also condemned the execution of one of her country’s citizens.

The UN’s Office of the High Commissioner for Human Rights said it was “incomprehensible” that Indonesia – while seeking clemency for its own citizens abroad – “absolutely refuses to grant... [it] on its own territory”.

More details emerged of the executions on Nusakambangan Island, with a Catholic priest describing how the men sang hymns including “Amazing Grace” until gunfire rang out. All eight, who were tied to wooden crosses, declined to be blindfolded, according to Father Charles Burrows. Mr Chan’s brother, Michael, tweeted: “I have just lost a courageous brother to a flawed Indonesian legal system.”

Indonesia shrugged off the tough words, with President Joko Widodo vowing to continue using the death penalty. “This is about our legal sovereignty,” he told local media.

More than 100 people remain on death row in Indonesia, around a third of them foreigners, mostly for drug crimes.