I suppose you know one of our High Court Judges has advocated the application of Sharia Law in England?
Maybe if we started stoning people who entered illicit relationships...
There are some laws that have never actually been repealed, such as hanging for theft. Sending them to Australia is off these days, so maybe the rope-making industry will benefit? It's just a thought.
One of the drawbacks of immigration and the cultural changes it's brought to some areas is the mass closure of public houses (pubs), but that goes in common with the closure of post offices in rural areas, i.e., economics, and uneven tax laws that give alcohol sales in supermarkets the edge on pubs. Although in areas of greater migration from south-western Asia there's less business for publicans due to their rules on alcohol consumption (in public).
There aren't any actual laws being flouted, just customs and the claiming of financial benefits (handouts) for families of those who claim they'll be persecuted if sent back to their country of origin. As you say we're a soft touch.