From Bonhams: Wren was apprenticed at the Compton pottery set up by Mary Watts. After her husband's death Wren was commissioned to produce the memorial relief for Postman's Park and also, after a design by Mary, a plaster recumbent figure of Watts in the cloisters of the Watts Cemetery. Later he is known to have produced works in bronze.
The magnificent book, 'Mary Seton Watts and the Compton Pottery' by Hilary Calvert & Louise Boreham provides: "Wren worked at Compton until 1930 and was responsible for most of the finely sculpted figures produced during those years. Having attended Godalming Technical College as a student, he subsequently taught evening classes there ..."