Hello there,
Welcome to Rootschat.    

   You'll find us all very friendly and eager to help (if we can).
Here are the GRO refs. that are matches for your family above.
1868 - Winifred Burton - Birth
     Volume - 6a   Page - 433
     Quarter - September
     District - Ledbury
1872 - Elizabeth Burton - Birth
     Volume - 6a   Page - 496
     Quarter - June
     District - Hereford
I found them out on the 1861/71 & 81 Census and discovered that Winifred was born in Woolhope, Herefordshire and Elizabeth, Fownhope, Herefordshire.  The above registration districts correspond with these birthplaces.
You can apply for the birth certificates online at - 
http://www.gro.gov.uk/gro/content/certificate/index.asp#0If you haven't got the census information (above), and would like them, let me know and I'll post them.
All the best
Sue    
