Renegade Ugandan army General David Sejusa has accused President Yoweri Museveni of creating a “political monarchy” to hang on to power.
In his first interview since he fled to the UK last month, the four-star general told the BBC that Mr Museveni’s plans should be opposed.
Gen Sejusa fled after claiming that Mr Museveni was grooming his son Muhoozi Kainerugaba to succeed him.
The government has repeatedly denied any such plan.
Mr. Museveni has been in power since 1986, and elections are due in 2016.