In U.S. we have all kinds of S.E. opns. Used to fly Hueys, IMC, no Auto-Pilot, 1 ADF, 1 OBS. The thing here is 2 generators. Although, I've flown Cessna 152's IMC, one alternator, no autopilot. In commercial opns here, need 2 pilots for IFR, or an auto-pilot and less than 10 pax aircraft, (I believe).