This page is a placeholder for what is hoped to be a more comprehensive listing and set of downloads of British postal treaties and conventions (and the Postal Union treaties and conventions).
In the meantime, it includes John Copeland's excellent listings of treaties and UPU conventions for which the text is available free on the internet, plus a few examples that were formerly in the Miscellaneous section.
Links to UK Postal Treaties Available Free on the Internet
[36pp, 717Kb, 2019]
Links to UPU Conventions and Related Documents Available Free on the Internet
[31pp, 381Kb, 2019]
1846 Postage Convention between Great Britain and Prussia
[107pp, 7.4Mb, 1847]
In both English and German
UPU Convention of Washington
[106pp, 21Mb, 1897]
Including the Detailed Regulations