Supreme Court Ruling on Income Threshold (Settlement Visas)

There's a very damning yet accurate overview of the current tenant of 10 Downing Street by Will Sing writing on Comment Central. This paragraph caught my eye (emphasis mine):

"But she also knew the political cost of appearing ‘soft’ on immigration. The result? A series of pathetically punitive policies that put political appearance above human compassion. 2012’s changes to family migration rules quietly snuck in a minimum income threshold – £18,600 – that excludes 41 per cent of the population from sponsoring a foreign spouse to come to the UK and live together as a family. The Supreme Court ruled in February that such guidance unlawfully failed to protect the rights of children. No replacement guidance or policy change has yet seen the light of day."​

I confess to being in the dark about any relevant Supreme Court ruling. Anyone any information about it they can share?

https://www.google.co.uk/amp/s/www....ncome-rule-18600-sponsor-foreign-spouses/amp/