Windrush was invited over by London bus and train companies because they believed that, rather than cutting jobs, importing people to work unsustainable jobs using government bailout money would increase demand and thus wealth. Keynesianism caused mass immigration in Britain.
You know that these people come from an extremist & de-institutionalized fringe because they're all theory and no concrete data. Most billionaires in Britain donate to RW parties, business owners also heavily skew right. Jim Ratcliffe is more radical in his rhetoric than Lowe is.