My ideas:
1. Accept that statistically, around 70-80% of these people will qualify for asylum.
2. Employ (a lot) more people to process them. Employ directly, instead of paying stupid money to dodgy contractors.
3. Get successful applicants into the world of work, in taxpaying jobs, not the cash-in-hand black economy.
4. Join the EU so that the Dublin Agreement applies again.
5. Agree with the EU to take our fair share of asylum seekers but no more.
6. Build more social housing. Prefabs if necessary.
7. Give financial incentives for racists to emigrate to the Falklands. (It is apparently a bit like 1950s Britain.)
8. Stop dog-whistling racist BS and spending vast sums of money just to appeal to knuckledraggers but with no actual impact in the real world. (E.g. the Rwanda scheme, which is so ludicrously expensive it would be cheaper to put each individual through university. Even if it was practicable, which it ain't.)