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Giardelli’s work is held in many collections including the Tate, the National Museum of Wales, the National Library of Wales, Contemporary Art Society of Wales, Arts Council of Wales, Museum of Modern Art Wales, Brecknock Museum, Tenby Museum and Art Gallery together with museums and galleries in New York, Dublin, Nantes, Bratislava and Prague.
Blaker is best known nowadays as advisor to the sisters Gwendoline and Margaret Davies of Llandinam (Wales UK) in the formation of their internationally renowned collection of French nineteenth century painting and sculpture which they bequeathed to the National Museum of Wales in Cardiff.
In April 2013, Elias' work was included in a major exhibition at the National Museum of Wales, Cardiff, titled Pop and Abstract, alongside work by David Hockney, Peter Blake, Allen Jones, Bridget Riley and others.