Once again, another numpty who hasn't a clue about immigration figures. Do you think these are all people who come here on boats?
Almost half a million of those immigrants were students. Over 100k came from Ukraine. It's also worth considering that our universities are overall dependent on foreign students.
Sadly, lots look at immigration figures like these and presume they're mainly asylum seekers or illegal immigrants. In fact, the numbers claiming asylum are relatively low. The UK has also granted a lot of work visas to non-EU citizens.