The British mother of two girls who lost their father in the world's worst single plane crash in 1985, has expressed both confusion and hope over the family's claim for official and direct compensation from Japan Airlines.

"There is some optimistic thought that there is room for negotiation," Susanne Bayly, 43, told a news conference Friday in Tokyo. "However, if there isn't a fair figure offered by the time we go back to London, we are going to take action within a month in a British court."

Bayly also expressed confusion over their recent negotiations with JAL, as the family had initially intended Friday to announce either an amicable settlement or a lawsuit against JAL and Boeing Co.