He is possibly best known for his role as Oliver Lacon in the BBC television adaptations of the John le Carré novels `` Tinker , Tailor , Soldier , Spy '' and `` Smiley 's People '' .
He is possibly best known for his role as Oliver Lacon in the BBC television adaptations of the John le Carré novels `` Tinker , Tailor , Soldier '' , `` Spy '' and `` Smiley 's People '' .