Going back to John's question about E. canariensis, a Canary Islands euphorbia which we saw growing well in several places in Victoria and South Australia was Euphorbia bourgeana syn. lambii - top two pictures. But it was always in frost-free gardens.
The most popular euphorbia we saw there seemed to be Euphorbia characias 'Tasmanian Tiger', selected some 20 years ago in Tasmania. People growing it often just called it Tassie Tiger. It is available in Europe too. Bottom picture.
Yes folks, at last I'm getting back in action! I've missed you all....