Language Certificate question KET ESOL GCSE

[qip]

Hi, just would like some clarification regarding english language requirements.
Before my wife got a spouse visa she did KET test abroad and now she did ESOL here in UK.

Her certificate states "Level 2 Certificate in ESOL Skills for Life" by City and Guilds.
Here https://www.gov.uk/government/uploads/s ... t_2014.pdf if you look for the wording only level 2 for Cambridge English Language Assessment is accepted. So this lead to confusion as some places state that Level 2 in Esol (not entry level 2) is equal to GCSE.

Is she require to complete GCSE at all or her certificate will be accepted as equal to GCSE or at least sufficient to pass english requirements criteria?