Made in Britain auction taking place at Sotheby's - my shortlist: /September 13, 2017 by Johannes Reponen Green Quadrant (1970-73) by Prunella Clough, Estimate £3,000 — £5,000 Large standing form (circa 1990) by Ewen Henderson, Estimate £3,000 — £5,000 Scaffolders (1978) by Michael Leonard, Estimate £3,000 — £5,000 Two Canisters (not dated) by Chris Keenan, Estimate £800 — £1,200 Three Sausages (C. 54) (1978) by Patrick Caulfield, R.A., Estimate £800 — £1,200