PeopleTributes flow in for 'visionary' architect of Norway's petroleum industryEquinor chief executive Anders Opedal describes Johnsen as a "great inspiration"Mover and shaker: Former Statoil chief executive Arve Johnson (left) in conversation with a Norwegian trades union official in 2016.Photo: NTB/SCANPIXIain EsauSenior reporterLondon