It was on the link you posted earlier -
In Ms Reeves’s
public spending audit, published last month, the Treasury warned that additional spending pressures for asylum and illegal migration amounted to £6.4 billion this year. We understand this figure to also include the £1.5 billion top-up mentioned above. The new government plans to make an immediate saving of £800 million in 2024–25 from ending the Rwanda migration deal and removing the retrospection of the Illegal Migration Act. That leaves a ‘net’ outstanding asylum pressure of £4.1 billion (£6.4 billion less £1.5 billion less £800 million) for the remainder of the year. Combined with the planned surplus of £240 million asylum, border, visa and passport operations, this points to eventual spending in this category of a little less than £4 billion in 2024–25 (as shown in Figure 1), with considerable uncertainty around this number.
Personally I don’t expect them to achieve that this year but I’d be amazed if it didn’t go down considerably over the next two years, given how badly it was being run previously and the size and length of the backlog.