John Allan, a former director of Avanti Architects, has over 35 years' experience in the conservation of Modern architecture, having worked on many high-profile listed buildings by pioneer Modern architects of the 1930s and post-war period. He was founding chairman, and is current international secretary, of DOCOMOMO-UK and has lectured internationally at architectural schools, conferences, and amenity societies. He was instrumental in creating the Isokon Gallery in Hampstead, where he is chairman of the Isokon Gallery Trust.