> Is it possible that Boris is talking about immigrants from Poland, Czech Republic etc. <
Excellent question! There is a clip at the link. In it Johnson spoke about Australian immigrants to the UK. But he skirted around the third-world immigrant problem. That’s my beef with him.
I would be disappointed if he skirted around that issue. However, in this day and age of PC, he might be charged with some crime or another in the UK if he directly criticized third world immigrants.