the House of Lords had to balance the United Kingdom's approach to prevention of illegal migration with its obligations under the Geneva Refugee Convention 1951 and the Race Relations Act 1976 s.19(B).

Overturning a decision of the Court of Appeal, the House of Lords held that a filtering scheme adopted by UK immigration officials at Prague airport amounted to the application of a racial stereotype to a particular ethnic group and was unlawful "inherent and systemic" racial discrimination..

For relevant general notes see Immigration/illegal workers and/or Racial discrimination/a general introductory note