Geoffrey Burgon died in 2010. Martin Buckley knew him and his cars well and might be worth contacting. See Martin’s piece in this obituary for Burgon:
http://www.guardian.co.uk/music/2010/sep/22/geoffrey-burgon-obituaryMichael Estorick should be contactable through the Estorick Collection gallery in Islington N1 – see:
http://www.estorickcollection.com/home.phpI knew the car when Michael owned it when it could be seen parked in the street in Primrose Hill with an old “McGovern for President” sticker in the window, presumably dating from the late 1960s.
Colin