It's not a defence. The "new city" per year is a scare mongering tactic that presents only a partial data picture as its basis.

It's a new city every year of only small boat arrivals. As others have pointed out the the wider picture is even more absurd. Largely of people not fleeing war or real conflict or difficulty either. But people who cannot support themselves.

Can you please define how an objective simple piece of data is somehow biased?

And, for avoidance of doubt, I do think immigration is both a good thing and a necessary thing. Of course, being an immigrant, I am somewhat biased.