Double Taxation Relief Manual: Guidance by country: Greece: Agreement
The agreement (SI 1954/142) has effect
a) In the United Kingdom for
i) Income Tax from 1952-53,
ii) Corporation Tax from 1 April 1964.
b) In Greece for the fiscal year beginning 1 July 1951 (as regards companies, from the accounting year ended after 1 March 1951).
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 Greece” will provide a link to the treaty.
The text of the Tax Treaty can be found via https://www.gov.uk/government/publications/greece-tax-treaties