Writer Terry Pratchett says watching a man die has reaffirmed his support for the right to assisted suicide.

Sir Terry, who has Alzheimer’s disease, watched a man take a lethal dose of barbiturates at a Swiss suicide clinic for a BBC documentary.

Anti-euthanasia campaigners criticised the decision to show the death of Peter Smedley, who had motor neuron disease.

Bishop of Rochester Michael Nazir-Ali called the program “propaganda on one side.”

But Sir Terry said on Tuesday he was ashamed that British people had “to drag themselves to Switzerland, at considerable cost, in order to get the services that they were hoping for.”

Assisted suicide is illegal in Britain, but no one has been prosecuted in recent years for helping a relative die abroad.

More In: International | News