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I've been chewing this bit of gristle over for ages and will continue to look for defining details but would appreciate some thoughts from folks here:

Elizabeth Webb marries in London in 1845.  She is of full age and father is Richard, no occupation.  Witnesses aren't family and her husband is from London. 

In 1851 the census shows she is 33yrs and born in Cheltenham.  The 1861 census is missing.  In 1871 she is 53 and born in Hereford.  She dies in 1873 and burial record says she is 53.  I found an Elizabeth Webb in the right part of London in 1841, aged 22 and 'not born in county', employed as a servant who might be my girl. 

So, her birth is 1818-1820, born Cheltenham, Glos or Herefordshire, father Richard Webb. 

I've got two sets of parents and have favoured each at different times but neither set ticks all the boxes so doubt creeps in:

Richard Webb married Elizabeth Yarnold in Lindridge, Worcs in 1814, baptised Elizabeth in Eastham, Hereford in 1818, or

Richard Webb marries Anne Nyend in 1803 in Cheltenham, baptises a second daughter Elizabeth in 1813 in Cheltenham

I don't know the areas concerned at all but the map shows they're relatively close.  I know ages and places of birth aren't always accurate but in the current absence of other defining facts which would you favour? 

Thank you.

Thank you both, a lot to go on now ... 

Thank you Bookbox, that saves me a fruitless search   

Thank you - I'll keep my fingers crossed.