“4. For the purpose ofs.3(5)(a) of the Immigration Act 1971 (c.77) the deportation of a foreign criminal is conducive to the public good. 5. The Secretary of State must make a deportation order in respect of a foreign criminal (subject to section 33).” 23. Parliament has therefore provided that if the relevant conditions in s.32(1)-(3) are met, the respondent has no discretion but must, subject to s.33, make a deportation order and that the deportation of the foreign criminal is conducive to the public good. Thus, as it seems to us, legislative policy has occupied what was formerly the field of executive policy. 24. S.33 then sets out a number of exceptions to the making of an automatic deportation order. These include as exception 1 in s.33(2)a where the removal of a foreign criminal in pursuance of the deportation order would breach that person’s Convention rights. This too now represents legislative policy. None of the other exceptions are relevant to the present appeal. It follows in the light of these statutory provisions that it is not open to the appellant to argue that his deportation is not conducive to the public good; nor is it necessary for the respondent to argue that it is. But the appellant may resist it on the basis that it would nevertheless be in breach of article 8.”
“For the purpose of section 3(5)(a) … the deportation of a foreign criminal is conducive to the public good”