A latex class for typesetting business letters in a traditional UK format. Attempts to guarantee the address panel and large exclusion zone from BS 1808 such that letters will reliably display their addresses in BS 4264 window envelopes. Copyright (C) Giles Robertson 2011- This material is subject to the LaTeX Project Public Licence. See http://www.ctan.org/tex-archive/help/Catalogue/licenses.lppl.html for the details of that licence.