Just tried this one today. I've travelled from St Pancras to Ebbsfleet, everything working spot on, changed ends in the train, just go into the first long tunnel and brakes cut in stopping the train. I've tried resetting emergency brake by holding it on. Checked I'm on right power supply Turned off and turned back on. I've no idea what triggered the brake and no idea why the process I've followed for the last 20 hours with the train is now not working. It's happened to me twice now. Bug or me being an idiot?