Peter Kardia, who has died aged 93, was an inspirational art school teacher who taught a generation of British sculptors and artists at St Martin’s School of Art and at the Royal College of Art between the years of 1960 and 1986. Unusually for that period, Peter defined himself as an art educationist rather than an artist. His formidable studio presence derived not from using his own work as a model for the analysis of what students had to offer,…