asked Her Majesty's Government:

Whether it is lawful for a British consular post to refuse to accept an application for registration as a British citizen, for processing by the Home Office, on the grounds that the applicant has refused to surrender a travel document for retention or confiscation by the consular post after (a) being encouraged to do so, and (b) allowing the consular post to have sight of and retain copies of the travel document.[HL6903]

Our consular staff overseas should not refuse to accept an application for registration as a British citizen on the grounds that a travel document has not been surrendered. Our consular posts only retain travel documents which they believe to be fraudulent or were issued in error.