This is not a good start to a morning commute. Four people had to be treated after falling ill at London Bridge railway station on Tuesday morning, with some worried the illness is the result of a chemical spill. The London Fire Brigade sent crews to investigate, and they failed to detect high readings of any chemicals. According to an ambulance service spokeswoman, three of the patients felt “unwell, dizzy or hot,” although a Metropolitan Police spokeswoman said there is nothing to link the four people who fell ill. The station has been reopened and trains are running normally.