A comprehensive agreement (SI1992/3207) has effect:
a) In the United Kingdom for income tax and capital gains tax from 1993-94, corporation tax from 1 April 1993.
b) In Guyana for taxes withheld at source from 1 January 1993, and for other taxes for the year of income commencing 1 January 1993.
If using the HMRC Intranet, the agreement can be viewed through the “New treaties/protocols in force” link on the sidebar. On the HMRC web-site, searching for “Treaties in force Guyana” will provide a link to the treaty.
The text of the Tax Treaty can be found via https://www.gov.uk/government/publications/guyana-tax-treaties