I haven't heard any of the political parties give us a plausible explanation on how they would stop illegal immigrants.
It's probably good to have legal immigration with the skills needed to do the jobs that need filling, and pay them properly.
It's the illegals who are basically queue jumpers, and who are a drain on the finances of the country, as they expect and get accommodation and healthcare at the taxpayers expense.
Your first paragraph is what citizens of the whole of Europe including the UK want the answer to.
The calls to leave the ECHR wouldn’t stop the boats. The boats need stopping physically, Laws are on paper & in the air, those on the beaches don’t do Laws.
The recent eye opener to me is what’s occurring in the Republic of Ireland, makeshift tents along canal banks & along the streets. That’s in your face stuff & that’s going on in the Med countries.
I think Governments had their chance to take drastic action years ago & just sat on their arses.
Noted yesterday that Biden has now issued an Executive Order relating to their Southern border.......3 years too late. And that where we & Europe....years too late.
As said, it’s physical action needed, Laws are not working for any of us.
EU elections are about to take place, Parties & politicians there are flapping, not because of the migrant numbers but because it’s THEIR JOBS at stake.