Police taking part in Operation Hawk, which is targetting cannabis factories, have made 93 arrests.
Officers have executed 28 warrants and found four cannabis factories in Bromley, seizing more than 2000 cannabis plants.
A firearm was also recovered in Sutton.
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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.
Mr Davis is chair of planning and was given meals at top restaurants, trips to the theatre and tickets to the Centre Court at Wimbledon.