I have always assumed that is Catherine's birth reg because she says she was born in St Giles whether it was Cripplegate or Bloomsbury is another matter because the family lived in and around Cripplegate most of the time (ahhh has a thought about 1851) but on one census its says St Giles Bloomsbury but that might be the enumerator's assumption.

...and yes I have seen those baptisms before it is them they seemed to be a bit tardy baptising their children. Jane Benge was born in 1864 and baptised in 1874!