Thank you very much for the quick response. UKBA website has the following note on their website
https://www.gov.uk/government/uploads/s ... r_2014.pdf
Spouse & partner: If you intend to apply under the spouse and partner route you must provide evidence that you have passed the speaking and listening components of a test at level A1 or above. You do not need to demonstrate reading and writing skills. Where a test examines all four components (speaking, listening, reading and writing) you do not need to pass the reading and writing components, you only need to evidence passing the speaking and listening components.
Settlement: If you intend to apply under the settlement route you must provide evidence that you have passed the speaking and listening components of a test at level B1 or above. You do not need to demonstrate reading and writing skills. Where a test examines all four components (speaking, listening, reading and writing) you do not need to pass the reading and writing components, you only need to evidence passing the speaking and listening components.
Based on the above, what do you think. She is applying for ILR as a spouse. So I think A1 or above should be okay. Your expert advice please.