Nationality — Statelessness — United Nations Convention on the Reduction of Statelessness, 1961 — Article 8 — British nationality — British Nationality Act 1981, Section 40(2) — Interpretation — Whether a person can be deprived of his status as a British citizen on the basis of repudiating his obligation of loyalty — Whether a person can be deprived of nationality on that basis if not posing a risk to national security — Dual nationality — Terrorism — Individual serving long prison sentence in third State — Whether capable of posing current threat — The law of England