Most initial applications for an extension or variation of leave to remain must be made to the UK Visas and Immigration (UKVI) on a designated application form. Failure to do so may render the application invalid. Exceptions include EEA applications (for which recommended forms are available) and asylum applicants.

When applying for a passport or visa certain applications are required as part of the documentation required to process your request. The forms must only be filled out and signed by the applicant.  If [..]