Ok, so here's the direct line ancestors for Evelyn Ridgway, as far as her great grandparents (my gggggrandparents). I'm quite proud of how far we've come...me as a beginner with all your wonderful help.
Evelyn Ridgway b 15/12/1910 Taunton Somerset
her parents:
Oliver Ridgway b 1885 Launceston Tasmania m 18/12/1907 West Monkton (have marriage cert), Somerset d 1966 NZ profession: carpenter, gardener
Ellen Parsons b1881 Taunton Somerset d

? Profession: Seamstress
Oliver's parents, Evelyn's paternal grandparents:
William Ridgway b1863 Bridgwater Somerset m 1883 Taunton Somerset d 1895 Carlton Victoria (32 years) Profession: carpenter [have death certificate]
Sarah Rossiter b1865 Taunton Somerset d?

Profession: Field worker
Ellen's parents, Evelyn's maternal grandparents:
George Parsons b1843 Taunton Somerset m1865 Taunton Somerset d??? still alive in 1907 for Ellen's marriage Profession: House Painter
Flora Hurford b1845 Taunton Somerset d??? Profession: Dressmaker
Family had the West Monkton Post office and grocers on Taunton Rd in 1891 and 1901 census
William's parents, Oliver's paternal grandparents, Evelyn's ggrandparents:
Samuel Ridway b abt1835 Burliscombe Devon m1861 Bridgwater Somerset d1901 Taunton, Somerset (death cert ordered) Profession: market gardener
Jane Thorne b abt1825 Aisholt Somerset d1897 Taunton Somerset (death cert ordered)
Sarah's parents, Oliver's maternal grandparents, Evelyn's ggrandparents:
George Rossiter b abt1823 Isle Abotts, Somerset m 1839 d 1891 Taunton, Somerset (death cert ordered) Profession: Farm Labourer
Mary Parker b abt1836 Staple Fitzpaire, Somerset d???
George Parson's parents, Ellen's paternal grandparents, Evelyn's ggrandparents:
Abraham Parsons b abt 1806 Kingston, Somerset m??? d 1877 Profession: Labourer
Charlotte Crocker b abt 1801 Taunton Somerset d 1884
Still to confirm connection therefore haven't ordered any certs.
Flora's parents, Ellen's maternal grandparents, Evelyn's ggrandparents:
James Batten (possibly step father as born out of wedlock) b abt1826 m 1851 d

Labourer
Mary Ann Hurford b abt 1826 d???
Flora's maternal grandparents, Ellen's ggrandparents, Evelyn's ggggrandparents:
Richard Hurford b abt 1789 m??? d1862
Ann b abt1791 d???
George's and Flora's parents and grandparents are a little shaky in confirming the relationships (so many kids in the census with few certs) - whether James is really Flora's father is yet to be determined.
And now I've reached the limits of what I can do...I'm stuck.
I'd really like to know what happened to Sarah Ridgway (Rossiter) and Ellen Ridgway (Parsons). I think Sarah may have either died in Australia or remarried. There is some talk of Ellen ending up in a mental institution, as her husband remarried.
Also, finding the deaths of George, Flora & Mary Ann Hurford; Mary Parker and Sarah Ridgway (Rossiter) would be good to help connect to the previous generation and to see if Alzheimer's is a factor.
If you can offer any suggestions on where to go next would be much appreciated. Cheers, Tristi