Mahatma Gandhi's principle of "non-violence" was formally known as?

My memory may have this wrong but I think he was the man that liked sex with multiple women at the same time.

You are right it is ahimsa not satyagraha. Ahimsa comes from a verse in the Mahabharata which reads as follows : « Ahimsa parmo dharma Dharma hinsa tadeva cha » meaning non violence is the greatest duty but use of violence to protect that dharma is equally important.

Gold Biscuit, I fully agree with you. When I read the question, I was looking for 'Ahimsa' for an answer which did not appear.

Non Violence actually translates to Ahimsa and not Satyagraha.

Sorry , meant Padayatra

Can’t think of a single UK politicians who currently practices Padaytara