This caught my eye too. Sarah James Pattenden married James Andrews Q4 1896 St Saviour Southwark Reg District. In 1939 Register Sarah is widowed, living at 23 Purbrook Street, Bermondsey, with Thomas born 24 Jun 1910 (and his wife), William J born 1 April 1916, and George born 12 Apr 1920.
So I think you can rule out the two St Olave births that aghadowey found. I must admit I wouldn't have thought Pattenden was that common a name, but hey ho.
Would the births be registered under a different mother's maiden name. For example was Florence previously married, or possibly were any of the births registered under the name Pattenden?
[WHOOPS Just noticed Comberton beat me to it with the other marriage - but the searching tips I suggested might still be worth doing]
Good luck
JULIAN