§ Bob Russell
To ask the Secretary of State for the Home Department whether those seeking British citizenship are required(a) to know the words of the National Anthem and (b) have knowledge of the flags and patron saints of the nations of the United Kingdom; and if he will make a statement. 
§ Mr. Browne
This knowledge is not currently required for registration or naturalisation as a British citizen. However, registrars and local authorities are encouraged to play the National Anthem at Citizenship Ceremonies.
When brought into force, the provisions of section 1 of the Nationality, Immigration and Asylum Act 2002 will require applicants to demonstrate "sufficient knowledge" of life in the United Kingdom. Details of precisely what this will entail have yet to be finalised, but the focus will be on the practical knowledge new citizens will need to participate fully in UK society.