The UK NARIC site states...
The UK NARIC Statement of Comparability is an officially recognised document that confirms the recognition of an overseas qualification and its comparable level in the UK, irrespective of it being an academic, vocational or professional award. It is used by universities, colleges, employers and Government departments and agencies forming part of their decision-making process. A Statement of Comparability can be used to help support applications made under Tiers 1 and 2 of the Points Based System for immigration to the UK; particularly the Graduate Entrepreneur route within Tier 1.
Source: NARIC Statement of Comparability
While the UK scuttled most of the Tier 1 route some time ago and the other tiered routes are evolved beyond recognition, a NARIC Statement of Comparability can be used to meet the English speaking requirement for all migrants, including spouses.
It costs GBP 55 and takes about 6 weeks. The product is a letter like this sample. I am already aware that NARIC does not enjoy an esteemed position by some expats who have used them in the Tiered routes.
A spouse does not require a work permit and does not need to show the Home Office anything from NARIC. The question concerns UK employers and the standards they would use.
For those incoming migrant spouses who wish to seek professional employment, is getting such a Statement of Comparability to show prospective employers an advisable preparatory step? Is it a good thing to 'have on hand'? Or do contemporary HR departments have sufficient information at their fingertips with Google?