An Act to grant certain duties, to alter other duties, and to amend the law relating to the National Debt and the Public Revenue, and to make further provision in connection with finance.
In the UK, the Chancellor delivers an annual Budget speech outlining changes in spending, tax and duty. The respective year's Finance Act is the mechanism to enact the changes.
The rules governing the various taxation methods are contained within the various taxation Acts. (For instance Capital Gains Tax legislation is contained within Taxation of Chargeable Gains Act 1992. The Finance Act details amendments to be made to each one of these Acts.
Stamp duty land tax
Stamp duty land tax (SDLT), a new tax on land transactions, was introduced by the 2003 Act. SDLT largely replaced stamp duty from 1 December 2003. SDLT is not a stamp duty, but a form of self-assessed transfer tax charged on "land transactions".
References
Charles Barcroft. The Finance Act 2003. (New Law Guides). LexisNexis UK. 2003. Google.