The Government has been accused of breaching the "fundamental rights" of a grandmother, originally from Teesside, sentenced to death in Indonesia for drug smuggling by refusing to pay for legal representation as she battles for her life.
Two judges at the High Court are being asked to rule that the Foreign Office's failure to arrange "an adequate lawyer" for Lindsay Sandiford is unlawful.
The 56-year-old, originally from Redcar, was given the death penalty by a court in Bali last week for taking 10.6lb of cocaine on to the island.
She was accused by the court of damaging the image of Bali and received the sentence despite prosecutors only asking for a 15-year jail term.
Aidan O'Neill QC said she was urgently in need of funding as she is currently without legal assistance and her family have exhausted all available resources.