Some great notes on Taxation from 's-cool'

Some basic principles of taxation
http://s-cool.co.uk/alevel/economics/taxation-and-government-spending/some-basic-principles-of-taxation.html

Taxation in the UK
http://s-cool.co.uk/alevel/economics/taxation-and-government-spending/taxation-in-the-uk.html

Some key tax issues in the UK
http://s-cool.co.uk/alevel/economics/taxation-and-government-spending/some-key-tax-issues.html

Public Sector Net Cash Requirement (PSNCR)
http://s-cool.co.uk/alevel/economics/taxation-and-government-spending/the-public-sector-net-cash-requirement-psncr.html