The lawyer of a dual British-Australian national indicted in a botched attempt to kidnap two Australian-Lebanese children at the center of a custody battle says his client will post bail and be released.

Joe Karam said Friday that judges approved bail of $20,000 for Adam Whittington, along with the equivalent sum for his British colleague a day earlier. It's unclear when they'll be released.

Whittington, who heads a British-based child recovery agency, allegedly masterminded the plot to kidnap the children from their Lebanese father in Beirut in April.

Whittington, his colleague and the children's Australian mother, Sally Faulkner, were charged with forceful kidnapping, which is punishable by up to 15 years imprisonment.

Faulkner and an Australian TV crew posted bail in April and have since returned to Australia.