Thank you for your reply. If you love a good mystery (so do I, cannot let it go, but frustrating) look at my post and lots of helpful people responding for Norah Edith Ettie Primrose Sinclair on the London branch of Roots over the last few days!
Putting a query on the Devon section it is more about the convent and will do as you suggest and send my questions to the organisations mentioned.
I have found her in 1911 census and she is at the convent in Boreham, Essex - Convent, Nursery & School, New Hall, Boreham working as a School Housemaid. I am presuming she was sent there once old enough to work - they had 52 nuns to look after ! Looking for information on that convent is very interesting, as it was a Royal palace going back Henry VIII time.