Nestingbirds
Denying the statistical fact that tens of millions have indeed arrived here in the last decade or two, as being completely irrelevant sounds like insanity to me.
"Tens of millions" means at least twenty million. That's a million a year for the last two decades.
I would very much like to see the evidence for this figure; I can find no year since 2000 in which over a million people immigrated into the UK. Net immigration in most of those years has been in the lower half of the hundred thousands. As a result, "tens of millions" sounds decidedly hyperbolic rather than statistically factual or simply factual.
Are you perhaps counting arrivals such students, and failing to notice their departure when they go home again after their three-year degree courses? Tourists "arrive", but they also leave. And so on.
Just so you know where I went for my figures, Statistica, using UKGov figures, gives the following figures for net immigration, rounded up to the nearest thousand:
year ending June 2000: 158,000
year ending June 2001: 171,000
year ending June 2002: 153,000
year ending June 2003: 148,000
year ending June 2004: 245,000
year ending June 2005: 206,000
year ending June 2006: 198,000
year ending June 2007: 233,000
year ending June 2008: 163,000
year ending June 2009: 229,000
year ending June 2010: 256,000
year ending June 2011: 249,000
year ending June 2012: 161,000
year ending June 2013: 208,000
year ending June 2014: 309,000
year ending June 2015: 329,000
year ending June 2016: 252,000
year ending June 2017: 249,000
year ending June 2018: 276,000
year ending June 2019: 184,000
year ending June 2020: 93,000
year ending June 2021: 484,000
year ending June 2022: 872,000
year ending June 2023: 906,000
year ending June 2024: 431,000
Net total immigrants between June 1999 and June 2024: (fewer than) 7,063,000.
Statistica estimate a figure of 431,000 for net migration in the year from June 2024 to June 2025, but that figure is certain to have to be adjusted a bit. That will bring the net total migration this century up to somewhere in the region of seven and a half million, not tens of millions.
(By the way, the two highest years for net immigration so far were under the most recent Conservative government, and the numbers have fallen again now.)