Germany could return to authoritarianism if the economic conditions were to seriously worsen in the country, the son of Hans Frank the governor general of Nazi occupied Poland during World War Two, has told BBC Hardtalk.

"As long as our economy is great, and as long as we make money everything is very democratic," said Niklas Frank, but "if we have five to 10 years heavy economic problems the swamp is a lake, and is a sea and will swallow again, everything," he added.

Niklas Frank said he "despises" his father for the crimes he committed while he was governor-general of Poland from 1939 to 1945, and tours Germany giving speeches about his father and the legacy of the Nazi era.

Hans Frank was convicted of war crimes and crimes against humanity at the Nuremberg trials and executed in 1946.

Watch the full interview on BBC World News and the BBC News Channel on Wednesday 26 April 2017 or watch again after broadcast on BBC iPlayer (UK only)