For settlement visas Life skills A1 will be sufficient (spouse visa)

For ILR and citizenship then life skills B1 or higher.

Worth going for life skills B1 if her English skills are good enough as you wont have to do it again.

If working as a nurse or similar then academic training with score 7 or higher.

http://www.ielts.org/test_takers_inf...migration.aspx

I have just been through this.

Needs to be taken at an approved centre. This can be checked here:

https://www.gov.uk/government/upload...st_Centres.pdf


Life skills costs around 11,500 pesos.