Hi Slipper
A few snippets that I have come across which may help and my apologies if you have this already but thought that if I tried to find out who John and Charlotte Mawby were then maybe it would help to find a link .................
I note with interest that in 1861 RG9 2211 6 5 Mary Bachelor and Ellen are living next door to .....
Charlotte Burton Head widow 79 Witton Warkwickshire
John Mawby son in law widow 42 Long Lawford - Railway Lab
John son 14 Lawford - ? Boy
Charlotte daugh 12 Lawford
Alfred son 3 Lawford
Could they be the witnesses John and Charlotte Mawby ..........
1851 H0107 2069 - Long Lawford - Address Hereford Grounds
John Mawby Head mar 33 Long Lawford - Railway Lab
Charlotte wife 29 Long Lawford
John son 6 Long Lawford
Charlotte daugh 3 Long Lawford
Free BMD marriage Mar 1842 Charlotte Burton and on the same page John Morby Dist Rugby Vol 16 Pg 417
Then in 1871 RG10 3184 5 4 - John Mawby widower and Ann Vann married on the 4th April 1869 (source Freereg) his father was William Mawby Lab
Also have you ruled out the birth for Ellen Mawby Free bmd Qtr 3 1844 Rugby?
Regards
Z