His major contributions to the medium are the removal of structural or outline-delineating lead through the production of seamless stained glass and, conversely, the production of related works created without glass, formed of calligraphic lead solder on sheet lead.
A lifelong exponent of the integration of art and architecture, his architectural collaborations include work with Zaha Hadid, Norman Foster, Arata Isozaki, Oscar Niemeyer, I.
He served a 7-year term as chairman of The Architecture Foundation, and served on the Design Review Committee of the Commission for Architecture and the Built Environment.
His artistic collaborations have included work with David Bailey, Hugh Hudson, Linda McCartney, Paul McCartney and Ivor Abrahams.