GB Mains Frequency (Hz) - Live Data 50.3 50.2 50.1 50.0 49.9 49.8 49.7 50.3 50.2 50.1 50.0 49.9 49.8 49.7 -10m -9m -8m -7m -6m -5m -4m -3m -2m -1m now waiting for data