Probably not a popular policy, but if I were in Government I'd have secure detention camps for illegal immigrants. Make use of military premises: there's a camp 5 miles up the road from me with dormitories for 600 people - hardly ever used.
People who arrive here undocumented shouldn't be free to mingle with the population. Some come from regimes with very different cultures to ours & some will have deep hatred for the west. Some will just disappear into society.
'Take back control' and mean it.
If it currently costs circa 1k a week to house each immigrant, why not offer each a lump sum to return to their home country?
There has to be a deterrent to slow down the flow of illegal immigration. The present hotel facilities are the inducement for the scale of illegal immigration we're seeing.
It has to stop if we're going to build a more equal, safe, tolerant society.