"After a carefully-managed introduction process, the two girls are getting along famously with the rest of the group," say zookeepers, "With dominant male Lucky taking a particular liking to Mo - who quite enjoys the flirty attention."
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The news comes as it was announced up to 4,000 prisoners are to be temporarily released in a bid to control the spread of coronavirus.
Lambeth Council said: "This is unacceptable. Unfortunately, the actions of a minority now mean that Brockwell Park will close on Sunday."
Watford General hospital asked people to stay away following an issue which they said did not pose any risk to patients.