The UK has closed legal and safe routes for asylum seekers. UK creates the market conditions for criminal gangs to sell boats to asylum seekers.
I am not denying the equally inhumane treatment of asylum seekers by the French either. If the French treated the asylum seekers better, it might deter some of them from wanting to come to UK, but it would not stop them. And France would then bear the majority burden of the asylum seekers, and UK would be content to continue to shoulder a proportional smaller fraction of the refugees.
If UK re-opened pre-existing opportunities, and created new safe and legal routes for asylum seekers, they would instantly make the criminal market opportunities unviable.
Instead the UK government prefer to shift the blame elsewhere. That is its modus operandi with all things wrong in society.
The current distrust, and removal of existing cooperation, generated by Brexit has exacerbated this problem, not resolved it.