Swimming lessons for toddler around Battersea (or Chelsea)

[Matl]

Hello!
I am looking for group swimming lessons for a 20 months old toddler (who has completed the first 7 stages of baby swimming with little dippers). We are a bit constrained on that we can only make weekend classes and ideally would be looking for a venue as close as possible to Battersea park.
Looking forward to your suggestions!
Thanks!

The baby swim centre in Wandsworth is good - have to book early though as they get booked up. Nice specialist baby pool (super warm and filtered rather than using chemicals) and lovely teachers

www.londonbabyswim.co.uk/locations/wandsworth/