Borders, Citizenship and Immigration Bill [Lords]

I do not wish to reopen the argument, but our proposals to amend the common travel area are based on our belief and strong advice that third-country nationals are using a route into the United Kingdom through the Republic of Ireland with criminal and malicious intent. Do the official Opposition accept that or not? If they do, do they have proposals as to how we should deal with it? Can we therefore have a discussion about potential amendments to how we police and secure our border?