I have already pointed out , with sources, that the BBC stuff is a myth. A very old one at that.
More importantly, however is that I have busted the very idea that the UK state has ever had any benign view of its black and brown population, ( see this thread ). Far from the popular narrative, they were welcomed here to do the jobs others didn't want to do ( that too is a lie, the Windrush manifest has war vetarans, plumbers, carpenters and engineers amongst its passengers) ,released Cabinet papers show virulently racist attitude towards Carribean and Indian migrants. Published legislation consistent show a progressive stripping non-white British citizens of rights of entry until they were considered not British. It is all is there to see.
As I explained to Aexodus in his health tourism thread , under May obsession with migration has reached the point where actual British citizens are denied health treatment, made jobless, homeless or deported, contrary to the law and the true migration status of victims.
As for the UK government to white EU migrants, it's stance on Brexit may offer a clue.
So go forth with your nonsense. I would rather people refer to the facts based on actual records.