Following this info on her profile by Private User:
=Leah Isaacs (nee Harris)'s marriage certificate dated 6 December 1837 says she was a Minor - which means she was under 21 at the time - so she was born AFTER 6 December 1816.
She is described on her marriage certificate as a minor, spinster, of 6 Elliston Street, Middlesex Street, daughter of Solomon Harris, General Dealer.
In the 1841 census (notoriously inaccurate for ages) she is 22 - at Harrow Alley, St Botolph Aldgate, London
In the 1851 census at 5 Harrow Alley she is 33, which would put her as born about 1818+
I am changing her birthdate to c 1818. Thanks for the research work, Private User.
The significance of being a minor is that a minor would require parental consent for marriage, while a bride or groom above the age of responsibility could marry without parental consent.
There were many cases of younger brides and grooms claiming to be older than they actually were, in order to avoid getting parental consent. Claiming to be a minor and hence requiring parental consent when the bride was actually older and not requiring parental consent would be odd to say the least.