"A person who is a national of a state which has ratified the European Convention on Social and Medical Assistance (done in Paris on11 December 1953 ) [ECSMA] or a state which has ratified the Council of Europe Social Charter [CESC] (signed in Turin on18 October 1961 ) and who is lawfully present in the United Kingdom."
"Each of the Contracting Parties undertakes to ensure that nationals of the other Contracting Parties who are lawfully present in any part of its territory to which this Convention applies, and who are without sufficient resources, shall be entitled equally with its own nationals and on the same conditions to social and medical assistance (hereinafter referred to as 'assistance') provided by the legislation in force from time to time in that part of its territory."
"With a view to ensuring the effective exercise of the right to social and medical assistance, the Contracting Parties undertake . . . 4. to apply the provisions referred to in paras 1, 2 and 3 of this article on an equal footing with their nationals to nationals of other contracting parties lawfully within their territories, in accordance with their obligations under [ECSMA]."
"(1) A person liable to detention … under paragraph 16 above may, under the written authority of an immigration officer, be temporarily admitted to the United Kingdom without being detained . . .; but this shall not prejudice a later exercise of the power to detain him. (2) So long as a person is at large in the United Kingdom by virtue of this paragraph, he shall be subject to such restrictions as to residence, as to his employment or occupation and as to reporting to the police or an immigration officer as may from time to time be notified to him in writing by an immigration officer."
"A person arriving in the United Kingdom by ship or aircraft shall for purposes of this Act be deemed not to enter the United Kingdom unless and until he disembarks, and on disembarkation at a port shall further be deemed not to enter the United Kingdom so long as he remains in such area (if any) at the port as may be approved for this purpose by an immigration officer; and a person who has not otherwise entered the United Kingdom shall be deemed not to do so as long as he is detained, or temporarily admitted or released while liable to detention, under the powers conferred by Schedule 2 to this Act … "
"The Contracting States shall not expel a refugee lawfully in their territory save on grounds of national security or public order."
"Each of the present applicants had only been granted temporary admission and they required, but had not received, leave to enter undersection 3 of the Immigration Act 1971 and by section 11 (1) of that Act a person is deemed not to have entered the United Kingdom so long as he is detained or temporarily admitted or released while liable to detention under the powers conferred by Schedule 2 of the Act. For the purposes of the Convention, a person temporarily admitted is therefore not to be regarded as lawfully in the territory. He is instead in an intermediate position which also differs from those in the country illegally … "
"In the whole context of the Immigration Act it is admittedly a device, but it is a device to prevent persons who have not been granted leave to enter, but whose case has to be further considered, from committing what would otherwise be a criminal offence under national law. So section 11 does go to the lawfulness of the person's presence and is directly relevant to the question of whether, under national rules, the seeker for asylum is 'unlawfully present' in this country. As I have already indicated, in my judgment the purpose and intention of the ECSMA rule is that that should be a matter for the contracting state."
"'Lawful purpose' in [the relevant legislation] should be read as a purpose that is authorised, as opposed to not forbidden, by law because that meaning best gives effect to the object of the section. The meaning of 'lawful' depends on its context, as Napier J pointed out in Crafter v Kelly [[1941] SASR 237 at 243]. As a result, a 'lawful purpose' may mean a purpose not forbidden by law or not unlawful under the statute that enacts the term…; or it can mean a purpose that is supported by a positive rule of law … As a general rule, interpreting 'lawful purpose' in a legislative provision to mean a purpose that is not forbidden, rather than positively authorised, by law is the interpretation that best gives effect to the legislative purpose of the enactment. This is because statutes are interpreted in accordance with the presumption that Parliament does not take away existing rights unless it does so expressly or by necessary implication… Nevertheless, the purpose, context or subject matter of a legislative provision may indicate that Parliament has used the term 'lawful purpose' to mean a purpose that is positively authorised by law."