Provides a guide to the structure of the UK tax system, the interaction between UK and EU law, and its application to various classes of taxpayer, as well as explaining the roles of the government departments who administer it and the full range of taxpayers rights and obligations. The fourth edition has been revised to cover the consequences of leaving the EU for the UK tax system and changes in loss and group relief rules. The book is for anyone studying the UK tax system, or advising on UK tax, from the experienced practitioner to the newly-qualified professional coming to tax advice for the first time, as well as being an ideal starting point for any students of the legal system or government.