Self Portrait in Ladies' Dressage Hat,
2015, was photographed at Soho Lofts in Wardour Street, London UK by the artist with the assistance of husband, William Jackson.
In addition to the titular dressage hat from Locke & Co in St James's, the portrait includes Firrell's grandmother's Viennese crystal and gold brooch and treasured Vivienne Westwood jacket based on an 18th-century riding jacket.