It is illegal to manufacture spirits in the UK without a distiller's licence which is required under the provisions of section 12 of the Alcoholic Liquor Duties Act 1979 and this includes manufacture for "own/domestic use".
Public Notice 39 - "Spirits production in the UK" dated July 2006 provides further information about HM Revenue & Customs' requirements.
If you require further assistance then please contact the National Advice Service on Telephone 0845 010 9000 or www.hmrc.gov.uk Where you can obtain & view Public Notice 39.