More than 700 seals have been recorded in the Thames Estuary.
In the first ever count by air, land and sea, the Zoological Society of London found hundreds of grey and harbour seals along the Thames and in small creeks and rivers.
"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."
Martin Stew has been enjoying the weather at London Zoo ahead of the first part of ITV's behind the scenes series on the famous attraction, which airs at 8pm tonight.
Tammy the anteater will be out roaming ZSL London Zoo from tonight, when a number of late night openings begin.
She's at her most active during the evening and early in the morning, but her eyesight isn't up to much, so the clumsy 12-year-old is getting a minder to make sure she doesn't get into trouble. We speak to keeper Caroline Westlake.
Twelve year old Tammy is very affectionate and friendly - but her poor eyesight makes her one of the more clumsy residents of ZSL London Zoo.
Now she's been given her own minder to keep an eye on her while she roams the public areas - along with plenty of two legged visitors - during a series of late night events at the zoo.
Tammy the anteater needs a minder for ZSL's late night events this summer
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