British grandmother on death row in Indonesia says Andrew Chan was her hero

British grandmother Lindsay Sandiford described Andrew Chan as "one of the heroes of my life". Photo / AP

A British grandmother on death row in Indonesia says executed Australian Andrew Chan was a hero to her.

Lindsay Sandiford, 58, said she was expecting to die shortly, after seven foreign drug convicts were executed last week, causing a storm of international protest.

"My execution is imminent and I know I might die at any time now. I could be taken tomorrow from my cell," Sandiford wrote in British newspaper the Mail on Sunday.

"I have started to write goodbye letters to members of my family."

She described Chan, one of two Australians killed by firing squad last week for his role in a plan to smuggle heroin, as "one of the heroes of my life".

The two became close friends in prison, where Chan spent a decade after being arrested as one of the Bali Nine group of smugglers.

Chan, who became a Christian pastor in prison and fellow Australian Myuran Sukumaran were executed last Wednesday.

Like the Australians, Sandiford wrote that she would not wear a blindfold when facing the firing squad and also planned to sing before her executioners - she has chosen the cheery popular song Magic Moments.

Chan and Sukumaran both declined blindfolds in their last moments and led their doomed group in singing the hymn Amazing Grace.

"I won't wear a blindfold. It's not because I'm brave but because I don't want to hide - I want them to look at me when they shoot me," Sandiford wrote.

She said her greatest sadness is that she may never meet her two-year-old granddaughter, who was born after her arrest.

Sandiford was sentenced to death in Bali in 2013 after she was convicted of trafficking cocaine worth an estimated £1.6 million (NZ$3.2 million).

She said she agreed to carry the drugs after a drug syndicate threatened to kill her son.

- AAP, AFP