Write a letter saying why you think the decision was wrong. Refer to the rules under which you applied. You must make your request no later than 28 days after you get the decision on your application. You can only make one reconsideration request. Email your request to the Home Office travel document enquiries team with ‘Reconsideration request’ and your application reference number in the subject line. Home Office travel document enquiries traveldocumentenquiries@homeoffice.gov.uk