I would also recommend Milk on Hildreth street.
Megan’s have a few places (Balham, Clapha Common, Clapham Old Town) and you can book which can be an advantage. The Apple Blue is also worth trying, but it is quite small and so wait times can be long.
If you are happy to venture to Northcote road, cafe Tamra is also a good place to go.
Finally on Abbeville road, Nue Ground is also worth a try.
Enjoy!

New addition is The Table on Battersea Rise and I can attest to an absolutely amazing brunch and service!

Flotsam and Jetsam and Toast Rack are both really good.

Brickwood does very good Aussie-style brunch, branches on Battersea Rise, Balham and Clapham Common. https://www.brickwoodcafes.co.uk/

Any recommendations for Sunday Brunch - scrambled eggs and smoked salmon etc.  We used to go to the Nightingale Patisserie, but it's not open on Sundays now.  Thanks in advance.