The Supreme Court has banned ousted PM Thaksin Shinawatra from travelling abroad. It says his requested trip lacks justification.

Thaksin wanted to begin another overseas trip late last month.

Yesterday's travel ban comes just days before he's set to go on trial for alleged corruption associated with a controversial Ratchadaphisek Road land purchase.

In a June 24 application, Thaksin sought permission to make three consecutive trips - a visit to China and England followed by another to China and Japan. His final visit included in the application was to China alone.

Hearing date

In rejecting the travel application, a nine-judge panel of the Criminal Division for Holders of Political Positions noted the time frame between his trial's first hearing date and his planned trip. The ruling applies solely to the June 24 application, and does not prejudice future requests.

Tuesday trial

From Tuesday until July 29, Thaksin's trial will hear 22 prosecution witnesses.

Evidence from a similar number of defence witnesses should wind up on August 22.

The tribunal has set aside August 26, August 29 and September 2 for a wrap-up of testimony. Closing statements ahead of a verdict follow.

A lawyer for Thaksin, Kam-nuan Chalopratham, says consideration is being given to a Supreme Court appeal of the travel ban, arguing it affects Thaksin's business interests.