Platinum Speakers Our Platinum (exclusive) speakers include: John Benjamin Brad Borkan Mark Brown Charles Burns The Rt Hon Sir Vince Cable Dave Coplin Major General Patrick Cordingley Professor Suzie Imber Naomi Riches MBE DL Dame Stella Rimington DCB MA Ben Saunders Helen Sharman CMG OBE Tiffany St JamesĀ David Vickery