% This version for paper with a printed logo.
%\documentclass[logo]{impletter}
% This version for plain paper.
\documentclass[blank]{impletter}


% To move the printed page up (minus value) or down (plus value):
\addtolength{\topmargin}{0mm}
% To move the printed text to the right (plus) or left (minus).
\addtolength{\evensidemargin}{0pt}
\addtolength{\oddsidemargin}{0pt}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\renewcommand{\today}{Date: \rule{4cm}{0.1mm}}

\begin{document}


\headers{
% Replace with the addressee details but DO NOT remove the \\ even if empty
\mbox{}\\
\\
\\
\\
\\
}
% Replace with the salutation for this letter
{

}
% Replace with your department, address, telephone, fax and e-mail.
% Do not remove the blank lines.
{
Department of Earth Science and Engineering,\\
Imperial College London\\

% Could add a line with the room number and building here
% and end the new line with \\
South Kensington Campus, London SW7 2AZ, UK\\
\\

\mbox{}\\
\\
}
% Replace with your name
{
\mbox{}
}
% Replace with your qualifications
{
\\
}
% Replace with your job title. A second line can be added if necessary.
{
\\
}
\textbf{CONSENT TO COPYRIGHT LICENSING UNDER THE LGPL}
\informal

% The text of the letter starts here
I give my consent to the redistribution and/or modification of my 
contributions to the\\
\mbox{Fluidity/Imperial College Ocean Model} project 
under the terms of the GNU Lesser General Public License as published 
by the Free Software Foundation; either version 2.1 of the License, or
(at each distributor's option) any later version.

\vspace{2cm}

% Leave the name field blank if you don't want your name to be
% printed at the bottom, but do not remove the {}.
\close{
Signed: \rule{8cm}{0.1mm}
}
{
Print name: \rule{8cm}{0.1mm}
}
\end{document}