Police, firefighters and ambulance staff are currently at the scene of John Lewis in Bluewater Shopping Centre which has been evacuated. It is believed the chemical spillage was from a fridge in the department store.
There are unconfirmed reports of injuries as a result of the leak.
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The 78-year-old woman suffered serious injuries after her bag became trapped between the doors of a train at Notting Hill Gate station.
The oil has affected wildlife and boat owners have been told not to move their vessels to avoid spreading it.
Fearing for public safety, PC Chegwin pushed her in the chest in a defensive manner, not knowing she had extensive breast surgery.