There is no evidence that Boris Wave had negative impact on GDP per person while there is evidence that Brexit had significant negative impact.
Generally refugees / asylum seekers have negative impact on the budget but their number is small so overall drag is small while skilled/work immigrants have positive impact (paying more in taxes then getting back) and there are more work migrants than refugees.
Generally refugees / asylum seekers have negative impact on the budget but their number is small so overall drag is small while skilled/work immigrants have positive impact (paying more in taxes then getting back) and there are more work migrants than refugees.