An Eva HENDRICKSE arrived in England from South Africa in 1958 with her husband Archibald, and two sons (Isaac and John). Although having a birthday in July, it was 30 July 1905, which doesn't match your Eva Muriel.
Name: Eva Hendrickse
Birth Date: 30 Jul 1905
Port of Departure: Durban, South Africa
Arrival Date: 19 Sep 1958
Port of Arrival: Southampton, England
Ship Name: Edinburgh Castle
I suspect her middle initial may have been "R", as per this HENDRICKSE family in Brixton in 1961.
http://interactive.ancestry.co.uk/1795/40020_611411_1310-001...